NO Phase Locked Loops (PLL) & Frequency Synthesis Circuits 2,400+

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Part	Manufacturer	Other IC type	Temperature Grade	No. of Terminals	Package Code	Package Shape	Surface Mount	Package Body Material	Maximum Supply Current (Isup)	No. of Functions	Technology	Screening Level	Terminal Form	Maximum Negative Supply Voltage (Vsup)	Nominal Negative Supply Voltage (Vsup)	Nominal Supply Voltage (Vsup)	Power Supplies (V)	Package Style (Meter)	Package Equivalence Code	Sub-Category	Terminal Pitch	Maximum Operating Temperature	Minimum Operating Temperature	Terminal Finish	Terminal Position	JESD-30 Code	Moisture Sensitivity Level (MSL)	Maximum Supply Voltage (Vsup)	Maximum Seated Height	Width (mm)	Qualification	Minimum Supply Voltage (Vsup)	Additional Features	Minimum Negative Supply Voltage (Vsup)	JESD-609 Code	Maximum Time At Peak Reflow Temperature (s)	Peak Reflow Temperature (C)	Length
5962-8875701EX	Texas Instruments	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1	CMOS	MIL-M-38510	THROUGH-HOLE			5 V		IN-LINE			2.54 mm	125 Cel	-55 Cel		DUAL	R-GDIP-T16		5.5 V	5.08 mm	7.62 mm	Qualified	4.5 V				NOT SPECIFIED	NOT SPECIFIED	19.56 mm
UC1634J	Texas Instruments	PLL FREQUENCY SYNTHESIZER	MILITARY	16	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1	BIPOLAR		THROUGH-HOLE			12 V	12	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel		DUAL	R-GDIP-T16		15 V	5.08 mm	7.62 mm	Not Qualified	8 V	MOTION CONTROL APPLICATIONS			NOT SPECIFIED	NOT SPECIFIED
UC1634J/883B	Texas Instruments	PLL FREQUENCY SYNTHESIZER	MILITARY	16	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1	BIPOLAR	MIL-STD-883	THROUGH-HOLE			12 V		IN-LINE			2.54 mm	125 Cel	-55 Cel		DUAL	R-GDIP-T16		15 V	5.08 mm	7.62 mm	Not Qualified	8 V	MOTION CONTROL APPLICATIONS
LMC568CN	Texas Instruments	PHASE LOCKED LOOP	OTHER	8	DIP	RECTANGULAR	NO	PLASTIC/EPOXY	2.4 mA	1	CMOS		THROUGH-HOLE			5 V	5	IN-LINE	DIP8,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-25 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDIP-T8		9 V	5.08 mm	7.62 mm	Not Qualified	2 V			e0			9.817 mm
UC2633J	Texas Instruments	PLL FREQUENCY SYNTHESIZER	OTHER	16	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1	BIPOLAR		THROUGH-HOLE			12 V		IN-LINE			2.54 mm	85 Cel	-25 Cel		DUAL	R-GDIP-T16		15 V	5.08 mm	7.62 mm	Not Qualified	8 V	MOTION CONTROL APPLICATIONS
CD54HC4046AF3A	Texas Instruments	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED	.16 mA	1	CMOS	38535Q/M;38534H;883B	THROUGH-HOLE			3 V	2/6	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	TIN LEAD	DUAL	R-GDIP-T16		6 V	5.08 mm	7.62 mm	Not Qualified	2 V			e0			21.34 mm
UC2633N	Texas Instruments	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	BIPOLAR		THROUGH-HOLE			12 V	12	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	85 Cel	-40 Cel		DUAL	R-PDIP-T16		15 V	5.08 mm	7.62 mm	Not Qualified	8 V	MOTION CONTROL APPLICATIONS			NOT SPECIFIED	NOT SPECIFIED	19.305 mm
5962-8875701EA	Texas Instruments	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED	.045 mA	1	CMOS	MIL-STD-883	THROUGH-HOLE			5 V	5	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	TIN LEAD	DUAL	R-GDIP-T16		5.5 V	5.08 mm	7.62 mm	Qualified	4.5 V			e0			21.34 mm
UC1635J	Texas Instruments	PLL FREQUENCY SYNTHESIZER	MILITARY	16	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1	BIPOLAR		THROUGH-HOLE			12 V	12	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel		DUAL	R-GDIP-T16		15 V	5.08 mm	7.62 mm	Not Qualified	8 V	MOTION CONTROL APPLICATIONS			NOT SPECIFIED	NOT SPECIFIED
UC1633J883B	Texas Instruments	PLL FREQUENCY SYNTHESIZER	MILITARY	16	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1			THROUGH-HOLE			12 V		IN-LINE			2.54 mm	125 Cel	-55 Cel		DUAL	R-GDIP-T16		15 V	5.08 mm	7.62 mm	Not Qualified	8 V
5962-9466401MEA	Texas Instruments	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	CERAMIC, METAL-SEALED COFIRED	4 mA	1	CMOS	MIL-STD-883	THROUGH-HOLE			10 V	5/15	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	TIN LEAD	DUAL	R-CDIP-T16		18 V	5.08 mm	7.62 mm	Qualified	3 V			e0			19.56 mm
5962-8960901EA	Texas Instruments	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED	.16 mA	1	CMOS	MIL-STD-883	THROUGH-HOLE			3 V	2/6	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	TIN LEAD	DUAL	R-GDIP-T16		6 V	5.08 mm	7.62 mm	Qualified	2 V			e0			21.34 mm
CD74HCT7046AEE4	Texas Instruments	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY	.16 mA	1	CMOS		THROUGH-HOLE			5 V	5	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDIP-T16		5.5 V	5.08 mm	7.62 mm	Not Qualified	4.5 V			e4			19.305 mm
CD74HC7046AEE4	Texas Instruments	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	CMOS		THROUGH-HOLE			3 V	2/6	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDIP-T16		6 V	5.08 mm	7.62 mm	Not Qualified	2 V			e4			19.305 mm
CD74HCT4046AEE4	Texas Instruments	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY	.16 mA	1	CMOS		THROUGH-HOLE			5 V	5	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	Nickel/Palladium/Gold (Ni/Pd/Au)	DUAL	R-PDIP-T16		5.5 V	5.08 mm	7.62 mm	Not Qualified	4.5 V			e4	NOT SPECIFIED	NOT SPECIFIED	19.305 mm
CD74HC4046AEE4	Texas Instruments	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	CMOS		THROUGH-HOLE			3 V	2/6	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDIP-T16		6 V	5.08 mm	7.62 mm	Not Qualified	2 V			e4			19.305 mm
AD9901TQ/883	Analog Devices	PHASE DETECTOR	MILITARY	14	DIP	RECTANGULAR	NO	CERAMIC, METAL-SEALED COFIRED		1		MIL-STD-883	THROUGH-HOLE			5 V	5/-5.2	IN-LINE	DIP14,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	TIN LEAD	DUAL	R-GDIP-T14		5.5 V	5.08 mm	7.62 mm	Not Qualified	4.5 V	ALSO OPERATES AT -5.2 V SUPPLY		e0			19.43 mm
AD9901KQZ	Analog Devices	PHASE DETECTOR	COMMERCIAL	14	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1			THROUGH-HOLE			5 V		IN-LINE			2.54 mm	70 Cel	0 Cel	TIN LEAD	DUAL	R-GDIP-T14		5.25 V	5.08 mm	7.62 mm	Not Qualified	4.75 V	ALSO OPERATES AT -5.2 V SUPPLY		e0			19.43 mm
AD9901TQ	Analog Devices	PHASE DETECTOR	MILITARY	14	DIP	RECTANGULAR	NO	CERAMIC, METAL-SEALED COFIRED					THROUGH-HOLE				5/-5.2	IN-LINE	DIP14,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	Tin/Lead (Sn/Pb)	DUAL	R-XDIP-T14					Not Qualified				e0
5962-9097901MCX	Analog Devices	PHASE LOCKED LOOP	MILITARY	14	DIP	RECTANGULAR	NO	CERAMIC, METAL-SEALED COFIRED		1			THROUGH-HOLE			5 V		IN-LINE				125 Cel	-55 Cel		DUAL	R-CDIP-T14					Not Qualified		ALSO OPERATES AT -5.2 V SUPPLY
AD9901KQ	Analog Devices	PHASE DETECTOR	COMMERCIAL	14	DIP	RECTANGULAR	NO	CERAMIC, METAL-SEALED COFIRED		1			THROUGH-HOLE			5 V	5/-5.2	IN-LINE	DIP14,.3	PLL or Frequency Synthesis Circuits	2.54 mm	70 Cel	0 Cel	TIN LEAD	DUAL	R-GDIP-T14		5.25 V	5.08 mm	7.62 mm	Not Qualified	4.75 V	ALSO OPERATES AT -5.2 V SUPPLY		e0			19.43 mm
5962-9097901MCA	Analog Devices	PHASE LOCKED LOOP	MILITARY	14	DIP	RECTANGULAR	NO	CERAMIC, METAL-SEALED COFIRED		1		MIL-STD-883	THROUGH-HOLE			5 V		IN-LINE				125 Cel	-55 Cel	TIN LEAD	DUAL	R-CDIP-T14					Not Qualified		ALSO OPERATES AT -5.2 V SUPPLY		e0
AD800-45BQ	Analog Devices	PHASE LOCKED LOOP	INDUSTRIAL	20	DIP	RECTANGULAR	NO	CERAMIC, METAL-SEALED COFIRED		1			THROUGH-HOLE	-5.5 V	-5.2 V	5 V		IN-LINE			2.54 mm	85 Cel	-40 Cel	TIN LEAD	DUAL	R-CDIP-T20			5.08 mm	7.62 mm	Not Qualified		ALSO OPERATES ON -5.2 VOLT SUPPLY	-4.5 V	e0
LC72130	Onsemi		INDUSTRIAL	24	SDIP	RECTANGULAR	NO	PLASTIC/EPOXY	10 mA		CMOS		THROUGH-HOLE			5 V	5	IN-LINE, SHRINK PITCH	SDIP24,.3	PLL or Frequency Synthesis Circuits	1.78 mm	85 Cel	-40 Cel		DUAL	R-PDIP-T24					Not Qualified
LC72121-D-E	Onsemi	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	22	DIP	RECTANGULAR	NO	PLASTIC/EPOXY	6 mA	1	CMOS		THROUGH-HOLE				3/3.3	IN-LINE	SDIP22,.3	PLL or Frequency Synthesis Circuits	1.78 mm	85 Cel	-40 Cel	Tin/Bismuth (Sn/Bi)	DUAL	R-PDIP-T22		3.6 V	3.9 mm	7.62 mm	Not Qualified	2.7 V			e6			21 mm
LC7185-8750	Onsemi		INDUSTRIAL	30	SDIP	RECTANGULAR	NO	PLASTIC/EPOXY	10 mA		CMOS		THROUGH-HOLE				5/8	IN-LINE, SHRINK PITCH	SDIP30,.4	PLL or Frequency Synthesis Circuits	1.78 mm	85 Cel	-40 Cel		DUAL	R-PDIP-T30					Not Qualified
LC72131K-E	Onsemi	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	22	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1			THROUGH-HOLE			5 V		IN-LINE			1.78 mm	85 Cel	-40 Cel		DUAL	R-PDIP-T22		5.5 V	3.9 mm	7.62 mm		4.5 V						21 mm
LC72137	Onsemi		COMMERCIAL	22	SDIP	RECTANGULAR	NO	PLASTIC/EPOXY	6 mA		CMOS		THROUGH-HOLE				3/3.3	IN-LINE, SHRINK PITCH	SDIP22,.3	PLL or Frequency Synthesis Circuits	1.78 mm	70 Cel	-20 Cel		DUAL	R-PDIP-T22					Not Qualified
LC72121	Onsemi		INDUSTRIAL	22	SDIP	RECTANGULAR	NO	PLASTIC/EPOXY	6 mA		CMOS		THROUGH-HOLE				3/3.3	IN-LINE, SHRINK PITCH	SDIP22,.3	PLL or Frequency Synthesis Circuits	1.78 mm	85 Cel	-40 Cel		DUAL	R-PDIP-T22					Not Qualified
LC72131K	Onsemi	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	22	SDIP	RECTANGULAR	NO	PLASTIC/EPOXY			CMOS		THROUGH-HOLE			5 V	5	IN-LINE, SHRINK PITCH	SDIP22,.3	PLL or Frequency Synthesis Circuits	1.78 mm	85 Cel	-40 Cel		DUAL	R-PDIP-T22					Not Qualified
LC72132	Onsemi		INDUSTRIAL	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY	10 mA		CMOS		THROUGH-HOLE			5 V	5	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	85 Cel	-40 Cel		DUAL	R-PDIP-T16					Not Qualified
MC74HC4046ANG	Onsemi	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	CMOS		THROUGH-HOLE			4.5 V	2/6	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	TIN	DUAL	R-PDIP-T16		6 V	4.44 mm	7.62 mm	Not Qualified	2 V	CONTAINS THREE PHASE COMPARATORS		e3		260	19.175 mm
MC14046BCP	Onsemi	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	CMOS		THROUGH-HOLE			5 V	5/15	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	TIN LEAD	DUAL	R-PDIP-T16		18 V	4.44 mm	7.62 mm	Not Qualified	3 V	IT CAN ALSO OPERATE AT 10V OR 15V NOMINAL		e0	30	235	19.175 mm
MC74HC4046AN	Onsemi	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	CMOS		THROUGH-HOLE			4.5 V	2/6	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDIP-T16		6 V	4.44 mm	7.62 mm	Not Qualified	2 V	CONTAINS THREE PHASE COMPARATORS		e0	30	240	19.175 mm
HCF4046BF	STMicroelectronics		INDUSTRIAL	16	DIP	RECTANGULAR	NO	CERAMIC			CMOS		THROUGH-HOLE				5/15	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	85 Cel	-40 Cel	TIN LEAD	DUAL	R-XDIP-T16					Not Qualified				e0
HCF4046BEY	STMicroelectronics	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	CMOS		THROUGH-HOLE			5 V	5/15	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	MATTE TIN	DUAL	R-PDIP-T16		20 V	5.1 mm	7.62 mm	Not Qualified	3 V			e3
TDA7327	STMicroelectronics	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1			THROUGH-HOLE			5 V		IN-LINE			2.54 mm	85 Cel	-40 Cel	TIN LEAD	DUAL	R-PDIP-T20		5.5 V	3.93 mm	7.62 mm	Not Qualified	4.5 V	IT ALSO REQUIRES 9V TO OPERATE		e0
HCF4046BE	STMicroelectronics		INDUSTRIAL	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY			CMOS		THROUGH-HOLE				5/15	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	85 Cel	-40 Cel	TIN LEAD	DUAL	R-PDIP-T16					Not Qualified				e0
ST7162N	STMicroelectronics	PLL FREQUENCY SYNTHESIZER	OTHER	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY	7.7 mA	1	CMOS		THROUGH-HOLE			5 V		IN-LINE			2.54 mm	70 Cel	-25 Cel		DUAL	R-PDIP-T16		5.5 V	5.1 mm	7.62 mm	Not Qualified	3 V
TDA7326	STMicroelectronics	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	CMOS		THROUGH-HOLE			5 V		IN-LINE			2.54 mm	85 Cel	-40 Cel	TIN LEAD	DUAL	R-PDIP-T16		5.5 V	5.1 mm	7.62 mm	Not Qualified	4.5 V			e0
TDA7427	STMicroelectronics	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1			THROUGH-HOLE			5 V		IN-LINE			2.54 mm	85 Cel	-40 Cel	MATTE TIN	DUAL	R-PDIP-T20		5.5 V	3.93 mm	7.62 mm	Not Qualified	4.5 V	ALSO REQUIRES A 10V NOMINAL SUPPLY		e3			25.15 mm
HCC4046BF	STMicroelectronics	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	CERAMIC, GLASS-SEALED		1	CMOS		THROUGH-HOLE			10 V	5/15	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	TIN LEAD	DUAL	R-GDIP-T16		18 V	5.08 mm	7.62 mm	Not Qualified	3 V			e0
SE564N	NXP Semiconductors	PHASE LOCKED LOOP	MILITARY	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY	60 mA	1	BIPOLAR		THROUGH-HOLE			5 V	5	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel		DUAL	R-PDIP-T16	1		4.2 mm	7.62 mm	Not Qualified							19.025 mm
TSA6060	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1			THROUGH-HOLE			5 V		IN-LINE			2.54 mm	85 Cel	-40 Cel	TIN/NICKEL PALLADIUM GOLD	DUAL	R-PDIP-T16		5.5 V	4.7 mm	7.62 mm	Not Qualified	4.5 V			e3/e4			21.6 mm
SA568AN	NXP Semiconductors	PHASE LOCKED LOOP	INDUSTRIAL	20	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1			THROUGH-HOLE			5 V	5	IN-LINE	DIP20,.3	PLL or Frequency Synthesis Circuits	2.54 mm	85 Cel	-40 Cel		DUAL	R-PDIP-T20		5.5 V	4.2 mm	7.62 mm	Not Qualified	4.5 V						26.73 mm
933809540652	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	AUTOMOTIVE	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	CMOS		THROUGH-HOLE			5 V		IN-LINE				125 Cel	-40 Cel		DUAL	R-PDIP-T16		6 V				3 V	ALSO OPERATES WITH 2V TO 6V IF VCO IS NOT USED			NOT SPECIFIED	NOT SPECIFIED
TSA6057	NXP Semiconductors	PLL FREQUENCY SYNTHESIZER	OTHER	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	BIPOLAR		THROUGH-HOLE			5 V		IN-LINE			2.54 mm	85 Cel	-30 Cel		DUAL	R-PDIP-T16		5.5 V	4.7 mm	7.62 mm	Not Qualified	4.5 V	4-BIT AUXILIARY INPUT COUNTER					21.6 mm
933296690652	NXP Semiconductors	PHASE LOCKED LOOP	INDUSTRIAL	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY		1	CMOS		THROUGH-HOLE					IN-LINE			2.54 mm	85 Cel	-40 Cel	NICKEL PALLADIUM GOLD	DUAL	R-PDIP-T16		15 V	4.7 mm	7.62 mm	Not Qualified	3 V			e4			21.6 mm

Phase Locked Loops (PLL) & Frequency Synthesis Circuits

Phase Locked Loops (PLL) and Frequency Synthesis Circuits are electronic circuits used to generate and control stable and precise frequencies for use in various applications, such as communication systems, signal processing, and instrumentation.

A PLL is a feedback system that compares the phase of an input signal to the phase of a reference signal and adjusts the output frequency to match the reference frequency. The basic components of a PLL include a phase detector, a low-pass filter, a voltage-controlled oscillator (VCO), and a frequency divider. The phase detector compares the phase of the input and reference signals and generates an error signal that is filtered and used to adjust the frequency of the VCO. The output of the VCO is divided by a frequency divider to generate the output frequency. PLLs are commonly used for frequency synthesis, clock recovery, and phase modulation/demodulation.

Frequency synthesis circuits are electronic circuits used to generate precise and stable frequencies by combining multiple signals with different frequencies. These circuits use various techniques, such as direct digital synthesis (DDS), fractional-N synthesis, and frequency mixing to generate frequencies. DDS is a technique that uses a digital signal generator to generate a waveform with a specific frequency, phase, and amplitude. Fractional-N synthesis is a technique that uses a PLL to generate a frequency that is a fraction of the reference frequency. Frequency mixing is a technique that combines two signals with different frequencies to generate a signal with a frequency equal to the difference between the two frequencies.

PLLs and frequency synthesis circuits are critical components in many electronic systems that require precise and stable frequencies. These circuits are used in communication systems, signal processing, instrumentation, and other applications where accurate frequency generation and control is required.