JPS5530273A - Pll synthesizer - Google Patents

Pll synthesizer

Info

Publication number
JPS5530273A
JPS5530273A JP10406078A JP10406078A JPS5530273A JP S5530273 A JPS5530273 A JP S5530273A JP 10406078 A JP10406078 A JP 10406078A JP 10406078 A JP10406078 A JP 10406078A JP S5530273 A JPS5530273 A JP S5530273A
Authority
JP
Japan
Prior art keywords
frequency
circuit
output
scaler
exclusive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP10406078A
Other languages
Japanese (ja)
Inventor
Masahiro Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP10406078A priority Critical patent/JPS5530273A/en
Publication of JPS5530273A publication Critical patent/JPS5530273A/en
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
    • H03L7/00—Automatic control of frequency or phase; Synchronisation
    • H03L7/06—Automatic control of frequency or phase; Synchronisation using a reference signal applied to a frequency- or phase-locked loop
    • H03L7/16—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop
    • H03L7/18—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop
    • H03L7/183—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number
    • H03L7/193—Indirect frequency synthesis, i.e. generating a desired one of a number of predetermined frequencies using a frequency- or phase-locked loop using a frequency divider or counter in the loop a time difference being used for locking the loop, the counter counting between fixed numbers or the frequency divider dividing by a fixed number the frequency divider/counter comprising a commutable pre-divider, e.g. a two modulus divider

Landscapes

  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To reduce FM noises due to the leakage of a phase-comparator reference signal frequency component to a VCO output frequency control terminal as to the output of modulus pre-scaler, by multiplying a delay circuit by N by an exclusive- OR circuit. CONSTITUTION:Between the voltage control variable frequency oscillator and variable dividers 8 and 9 in the PLL loop, N-multiplier B is provided. Then, N- multiplier B consists of delay circuit 11 which delays the output of two-modulus pre-scaler 7 by constant time and exclusive-OR circuit 12 which receives the outputs of two-modulus pre-scaler 7 and circuit 11 and generates an exclusive-OR output of two inputs. When the loop is in a synchronous state, the reference frequency of the phase comparator is N times and even if frequency characteristics of the damping factor of low-pass filter 4 are the same as before, the damping factor increases as high as the frequency becomes N times while FM noises lessen.
JP10406078A 1978-08-25 1978-08-25 Pll synthesizer Pending JPS5530273A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10406078A JPS5530273A (en) 1978-08-25 1978-08-25 Pll synthesizer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10406078A JPS5530273A (en) 1978-08-25 1978-08-25 Pll synthesizer

Publications (1)

Publication Number Publication Date
JPS5530273A true JPS5530273A (en) 1980-03-04

Family

ID=14370630

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10406078A Pending JPS5530273A (en) 1978-08-25 1978-08-25 Pll synthesizer

Country Status (1)

Country Link
JP (1) JPS5530273A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61105120A (en) * 1984-08-07 1986-05-23 ジヨン　フル−ク　マニフアクチヤリング　カムパニー　インコーポレイテツド Method of synthesizing frequency and frequency synthesizer

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61105120A (en) * 1984-08-07 1986-05-23 ジヨン　フル−ク　マニフアクチヤリング　カムパニー　インコーポレイテツド Method of synthesizing frequency and frequency synthesizer

Similar Documents

Publication Publication Date Title
JPH04505539A (en) A phase lock circuit and a frequency multiplier comprising the phase lock circuit
GB1253929A (en) Improvements in and relating to a frequency synthesizer
EP0378190A3 (en) Digital phase locked loop
CZ285960B6 (en) Process and apparatus for generating output signal having predetermined frequency drift with respect to a reference signal frequency
JPS5530273A (en) Pll synthesizer
US3805182A (en) Device for controlling the frequency and phase of an oscillator
KR970055559A (en) Noise Reduction Method for PLL Circuit and PLL Circuit
JPS56158536A (en) Pil oscillation circuit
JPS5550191A (en) Electronic timepiece
JPS56162580A (en) Pll circuit
JPH04186926A (en) Clock generating device
JPS5464956A (en) Pll circuit
JPS6333739B2 (en)
JPS6424632A (en) Phase locked loop circuit
JPS5483752A (en) Pll frequency synthesizer system
JPH0443716A (en) Frequency multipying circuit
FR2336003A1 (en) Phase control loop for oscillator - is used as phase shifter for generation of phase shift between oscillator and other frequency
JPS5918757Y2 (en) Frequency synthesizer using PLL circuit
JPS5676640A (en) Receiver of frequency synthesizer system
JPS5776930A (en) Frequency shift signal generating system using pll
JPH0529933A (en) Phase locked loop oscillator
JP3248453B2 (en) Oscillator
JPH04324716A (en) Frequency synthesizer
JPS5732133A (en) Phase-synchronous oscillator
JPS6432532A (en) Phase locked loop circuit