Infineon Technologies Phase Locked Loops (PLL) & Frequency Synthesis Circuits 146

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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	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	Maximum Supply Voltage (Vsup)	Maximum Seated Height	Width (mm)	Qualification	Minimum Supply Voltage (Vsup)	Additional Features	JESD-609 Code	Maximum Time At Peak Reflow Temperature (s)	Peak Reflow Temperature (C)	Length
MB15E06PV1	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	VBCC	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		BUTT	3 V		CHIP CARRIER, VERY THIN PROFILE				85 Cel	-40 Cel		BOTTOM	R-PBCC-B16	3.6 V	.8 mm	3.4 mm	Not Qualified	2.7 V			NOT SPECIFIED	NOT SPECIFIED	4.55 mm
IMI145156020LK	Infineon Technologies		MILITARY	20	QCCN	SQUARE	YES	CERAMIC			CMOS	38535Q/M;38534H;883B	NO LEAD			CHIP CARRIER	LCC20,.35SQ	PLL or Frequency Synthesis Circuits	1.27 mm	125 Cel	-55 Cel	Tin/Lead (Sn/Pb)	QUAD	S-XQCC-N20				Not Qualified			e0
IMI4343YB	Infineon Technologies	PHASE DETECTOR	INDUSTRIAL	8	SOP	RECTANGULAR	YES	PLASTIC/EPOXY			CMOS		GULL WING		3/5	SMALL OUTLINE	SOP8,.3	PLL or Frequency Synthesis Circuits	1.27 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G8				Not Qualified			e0
IMI145152XB	Infineon Technologies		INDUSTRIAL	28	SOP	RECTANGULAR	YES	PLASTIC/EPOXY			CMOS		GULL WING		3/5	SMALL OUTLINE	SOP28,.4	PLL or Frequency Synthesis Circuits	1.27 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G28				Not Qualified			e0
IMI145152028SK	Infineon Technologies		MILITARY	28	DIP	RECTANGULAR	NO	CERAMIC			CMOS	38535Q/M;38534H;883B	THROUGH-HOLE		3/9	IN-LINE	DIP28,.6	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	TIN LEAD	DUAL	R-XDIP-T28				Not Qualified			e0
CYW3335LFITR	Infineon Technologies		INDUSTRIAL	20	QCCN	SQUARE	YES	PLASTIC/EPOXY					NO LEAD		3/5	CHIP CARRIER	LCC20,.16SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	QUAD	S-PQCC-N20				Not Qualified			e0
IMI145158016SK	Infineon Technologies		MILITARY	16	DIP	RECTANGULAR	NO	CERAMIC			CMOS	38535Q/M;38534H;883B	THROUGH-HOLE	5 V	5	IN-LINE	DIP16,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	Tin/Lead (Sn/Pb)	DUAL	R-XDIP-T16				Not Qualified			e0
IMI145151YB	Infineon Technologies		INDUSTRIAL	28	SSOP	RECTANGULAR	YES	PLASTIC/EPOXY			CMOS		GULL WING		3/5	SMALL OUTLINE, SHRINK PITCH	SSOP28,.3	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G28				Not Qualified			e0
MB15F63ULPVA1	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	VQCCN	SQUARE	YES	PLASTIC/EPOXY		1	BICMOS		NO LEAD	3 V		CHIP CARRIER, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N20	3.3 V	.6 mm	3.5 mm	Not Qualified	2.7 V			NOT SPECIFIED	NOT SPECIFIED	3.5 mm
MB15F73SPPFT	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		GULL WING	2.7 V		SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G20	3.6 V	1.2 mm	4.4 mm	Not Qualified	2.4 V	SELECTABLE 64/65 OR 128/129 PRESCALER; 7 BIT SWALLOW COUNTER		NOT SPECIFIED	NOT SPECIFIED	6.5 mm
MB15F72ULPVA	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	VBCC	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		BUTT	2.7 V		CHIP CARRIER, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel		BOTTOM	R-PBCC-B20	3.6 V	.6 mm	3.4 mm	Not Qualified	2.4 V	SELECTABLE 64/65 OR 128/129 PRESCALER FOR THE 1300 MHZ AND 8/9 OR 16/17 PRESCALER FOR THE 350 MHZ		NOT SPECIFIED	NOT SPECIFIED	3.6 mm
MB15F73ULPVA	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	VBCC	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		BUTT	2.7 V		CHIP CARRIER, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel		BOTTOM	R-PBCC-B20	3.6 V	.6 mm	3.4 mm	Not Qualified	2.4 V	SELECTABLE 64/65 OR 128/129 PRESCALER FOR THE 2250 MHZ AND 8/9 OR 16/17 PRESCALER FOR THE 600 MHZ		NOT SPECIFIED	NOT SPECIFIED	3.6 mm
WB1331XX	Infineon Technologies		INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY			BICMOS		GULL WING		3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP20,.25	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G20				Not Qualified			e0
MB15E03PFV1	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		GULL WING	3 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G16	3.6 V	1.45 mm	4.4 mm	Not Qualified	2.7 V	ALSO REQUIRES 2.7V TO 6V SUPPLY		NOT SPECIFIED	NOT SPECIFIED	5 mm
IMI145152YB	Infineon Technologies		INDUSTRIAL	28	SSOP	RECTANGULAR	YES	PLASTIC/EPOXY			CMOS		GULL WING		3/5	SMALL OUTLINE, SHRINK PITCH	SSOP28,.3	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G28				Not Qualified			e0
WB1337XG	Infineon Technologies		INDUSTRIAL	16	SOP	RECTANGULAR	YES	PLASTIC/EPOXY			BICMOS		GULL WING		3/5	SMALL OUTLINE	SOP16,.25	PLL or Frequency Synthesis Circuits	1.27 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G16				Not Qualified			e0
MB15E05SLPV1	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	VBCC	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		BUTT	3 V		CHIP CARRIER, VERY THIN PROFILE				85 Cel	-40 Cel		BOTTOM	R-PBCC-B16	3.6 V	.8 mm	3.4 mm	Not Qualified	2.4 V			NOT SPECIFIED	NOT SPECIFIED	4.55 mm
IMI145152028PB	Infineon Technologies		INDUSTRIAL	28	DIP	RECTANGULAR	NO	PLASTIC/EPOXY			CMOS		THROUGH-HOLE		3/9	IN-LINE	DIP28,.6	PLL or Frequency Synthesis Circuits	2.54 mm	85 Cel	-40 Cel	TIN LEAD	DUAL	R-PDIP-T28				Not Qualified			e0
MB15E07LPV	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	VBCC	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		BUTT	3 V		CHIP CARRIER, VERY THIN PROFILE				85 Cel	-40 Cel		BOTTOM	R-PBCC-B16	3.6 V	.8 mm	3.4 mm	Not Qualified	2.7 V	ALSO REQUIRES 0V TO 6V SUPPLY		NOT SPECIFIED	NOT SPECIFIED	4.55 mm
MB15E07PFV1	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	LSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		GULL WING	3 V		SMALL OUTLINE, LOW PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G16	3.6 V	1.45 mm	4.4 mm	Not Qualified	2.7 V			NOT SPECIFIED	NOT SPECIFIED	5 mm
WB1315XX	Infineon Technologies		INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY			BICMOS		GULL WING		3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP20,.25	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G20				Not Qualified			e0
MB15F73UV	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	18	VQCCN	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		NO LEAD	2.7 V		CHIP CARRIER, VERY THIN PROFILE			.45 mm	85 Cel	-40 Cel		QUAD	R-PQCC-N18	3.6 V	.5 mm	2.4 mm	Not Qualified	2.4 V			NOT SPECIFIED	NOT SPECIFIED	2.7 mm
MB15E07SRPFT	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY					GULL WING		2.7/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP16,.25	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G16				Not Qualified
MB15F78ULPV	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	VBCC	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		BUTT	2.7 V		CHIP CARRIER, VERY THIN PROFILE			.5 mm	85 Cel	-40 Cel		BOTTOM	R-PBCC-B20	3.6 V	.6 mm	3.4 mm	Not Qualified	2.4 V	SELECTABLE 32/33 OR 64/65 FOR 2600 MHZ PRESCALER, AND 16/17 OR 32/33 FOR 1200 MHZ PRESCALER				3.6 mm
IMI145152QB	Infineon Technologies		INDUSTRIAL	28	QCCJ	SQUARE	YES	PLASTIC/EPOXY			CMOS		J BEND		3/5	CHIP CARRIER	LDCC28,.5SQ	PLL or Frequency Synthesis Circuits	1.27 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	QUAD	S-PQCC-J28				Not Qualified			e0
IMI145158016PB	Infineon Technologies		INDUSTRIAL	16	DIP	RECTANGULAR	NO	PLASTIC/EPOXY			CMOS		THROUGH-HOLE	5 V	5	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
WB1333XX	Infineon Technologies		INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY			BICMOS		GULL WING		3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP20,.25	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G20				Not Qualified			e0
WB1330XX	Infineon Technologies		INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY			BICMOS		GULL WING		3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP20,.25	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G20				Not Qualified			e0
IMI145152028LK	Infineon Technologies		MILITARY	28	QCCN	SQUARE	YES	CERAMIC			CMOS	38535Q/M;38534H;883B	NO LEAD		3/9	CHIP CARRIER	LCC28,.45SQ	PLL or Frequency Synthesis Circuits	1.27 mm	125 Cel	-55 Cel	Tin/Lead (Sn/Pb)	QUAD	S-XQCC-N28				Not Qualified			e0
IMI145156020PB	Infineon Technologies		INDUSTRIAL	20	DIP	RECTANGULAR	NO	PLASTIC/EPOXY			CMOS		THROUGH-HOLE			IN-LINE	DIP20,.3	PLL or Frequency Synthesis Circuits	2.54 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDIP-T20				Not Qualified			e0
WB1310XX	Infineon Technologies		INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY			BICMOS		GULL WING		3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP20,.25	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G20				Not Qualified			e0
IMI145151QB	Infineon Technologies		INDUSTRIAL	28	QCCJ	SQUARE	YES	PLASTIC/EPOXY			CMOS		J BEND		3/5	CHIP CARRIER	LDCC28,.5SQ	PLL or Frequency Synthesis Circuits	1.27 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	QUAD	S-PQCC-J28				Not Qualified			e0
IMI145155020LT	Infineon Technologies		MILITARY	20	QCCN	SQUARE	YES	CERAMIC			CMOS		NO LEAD		3/7	CHIP CARRIER	LCC20,.35SQ	PLL or Frequency Synthesis Circuits	1.27 mm	125 Cel	-55 Cel	Tin/Lead (Sn/Pb)	QUAD	S-XQCC-N20				Not Qualified			e0
IMI145155018PB	Infineon Technologies		INDUSTRIAL	18	DIP	RECTANGULAR	NO	PLASTIC/EPOXY			CMOS		THROUGH-HOLE		3/7	IN-LINE	DIP18,.3	PLL or Frequency Synthesis Circuits	2.54 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDIP-T18				Not Qualified			e0
WB1315XX-TR	Infineon Technologies		INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY			BICMOS		GULL WING		3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP20,.25	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G20				Not Qualified			e0
WB1305XX	Infineon Technologies		INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY			BICMOS		GULL WING		3/5	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP20,.25	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDSO-G20				Not Qualified			e0
MB15F72UV	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	18	VQCCN	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		NO LEAD	2.7 V		CHIP CARRIER, VERY THIN PROFILE			.45 mm	85 Cel	-40 Cel		QUAD	R-PQCC-N18	3.6 V	.5 mm	2.4 mm	Not Qualified	2.4 V			NOT SPECIFIED	NOT SPECIFIED	2.7 mm
IMI145152028LT	Infineon Technologies		MILITARY	28	QCCN	SQUARE	YES	CERAMIC			CMOS		NO LEAD		3/9	CHIP CARRIER	LCC28,.45SQ	PLL or Frequency Synthesis Circuits	1.27 mm	125 Cel	-55 Cel	Tin/Lead (Sn/Pb)	QUAD	S-XQCC-N28				Not Qualified			e0
MB15F63ULPFT	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY	10 mA		BICMOS		GULL WING	3 V	3	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP20,.25	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G20				Not Qualified
MB15F78SPPFT	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		GULL WING	2.7 V		SMALL OUTLINE, THIN PROFILE, SHRINK PITCH			.65 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G20	3.6 V	1.2 mm	4.4 mm	Not Qualified	2.4 V	SELECTABLE 32/33 OR 64/65 FOR 2550 MHZ PRESCALER, AND 16/17 OR 32/33 FOR 1200 MHZ PRESCALER		NOT SPECIFIED	NOT SPECIFIED	6.5 mm
IMI145156020SK	Infineon Technologies		MILITARY	20	DIP	RECTANGULAR	NO	CERAMIC			CMOS	38535Q/M;38534H;883B	THROUGH-HOLE			IN-LINE	DIP20,.3	PLL or Frequency Synthesis Circuits	2.54 mm	125 Cel	-55 Cel	TIN LEAD	DUAL	R-XDIP-T20				Not Qualified			e0
IMI4347PB	Infineon Technologies	PHASE DETECTOR	INDUSTRIAL	8	DIP	RECTANGULAR	NO	PLASTIC/EPOXY			CMOS		THROUGH-HOLE		3/5	IN-LINE	DIP8,.3	PLL or Frequency Synthesis Circuits	2.54 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	DUAL	R-PDIP-T8				Not Qualified			e0
MB15F78ULWQN	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	20	QCCN	SQUARE	YES	PLASTIC/EPOXY	3.9 mA		BICMOS		NO LEAD		2.4/3.6	CHIP CARRIER	LCC20,.16SQ,20	PLL or Frequency Synthesis Circuits	.5 mm	85 Cel	-40 Cel		QUAD	S-PQCC-N20				Not Qualified
IMI145158016ST	Infineon Technologies		MILITARY	16	DIP	RECTANGULAR	NO	CERAMIC			CMOS		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-XDIP-T16				Not Qualified			e0
MB15E07SRPV1	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	VBCC	RECTANGULAR	YES	PLASTIC/EPOXY		1			BUTT	3.75 V		CHIP CARRIER, VERY THIN PROFILE			.8 mm	85 Cel	-40 Cel		BOTTOM	R-PBCC-B16	5 V	.8 mm	3.4 mm	Not Qualified	2.7 V			NOT SPECIFIED	NOT SPECIFIED	4.55 mm
MB15E05SLPV	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	VBCC	RECTANGULAR	YES	PLASTIC/EPOXY		1	BICMOS		BUTT	3 V		CHIP CARRIER, VERY THIN PROFILE				85 Cel	-40 Cel		BOTTOM	R-PBCC-B16	3.6 V	.8 mm	3.4 mm	Not Qualified	2.4 V			NOT SPECIFIED	NOT SPECIFIED	4.55 mm
MB15E06SRPFT	Infineon Technologies	PLL FREQUENCY SYNTHESIZER	INDUSTRIAL	16	TSSOP	RECTANGULAR	YES	PLASTIC/EPOXY	11.5 mA				GULL WING	3 V	3	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH	TSSOP16,.25	PLL or Frequency Synthesis Circuits	.635 mm	85 Cel	-40 Cel		DUAL	R-PDSO-G16				Not Qualified
IMI145155020QB	Infineon Technologies		INDUSTRIAL	20	QCCJ	SQUARE	YES	PLASTIC/EPOXY			CMOS		J BEND		3/7	CHIP CARRIER	LDCC20,.4SQ	PLL or Frequency Synthesis Circuits	1.27 mm	85 Cel	-40 Cel	Tin/Lead (Sn/Pb)	QUAD	S-PQCC-J20				Not Qualified			e0

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.