JPS56140707A - Phase comparator - Google Patents

Phase comparator

Info

Publication number
JPS56140707A
JPS56140707A JP4333080A JP4333080A JPS56140707A JP S56140707 A JPS56140707 A JP S56140707A JP 4333080 A JP4333080 A JP 4333080A JP 4333080 A JP4333080 A JP 4333080A JP S56140707 A JPS56140707 A JP S56140707A
Authority
JP
Japan
Prior art keywords
transistors
input signal
input
phase
noise
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.)
Granted
Application number
JP4333080A
Other languages
Japanese (ja)
Other versions
JPH023564B2 (en
Inventor
Naotoshi Higashiyama
Hidekazu Ishii
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.)
NEC Corp
Original Assignee
NEC Corp
Nippon Electric 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 NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP4333080A priority Critical patent/JPS56140707A/en
Publication of JPS56140707A publication Critical patent/JPS56140707A/en
Publication of JPH023564B2 publication Critical patent/JPH023564B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)

Abstract

PURPOSE:To secure a phase comparing action over the entire period of the input signal and thus reduce the effect of the noise, by earthing the emitter of a transistor to which the input signal is applied via a resistance. CONSTITUTION:The input signal is applied to the terminals 1 and 2, and the output of a voltage control oscillator. The resistances 18 and 19 are connected to the emitters of the transistors 3 and 4 to which the input is applied and then earthed. Thus, the transistors 3 and 4 never cause the switching, and the phase jitter due to the noise voltage is not fixed any more with every period. At the same time, the signal currents of the transistors 3 and 4 increase in proportion to the increment of the input level. As a result, the phase comparison gain is increased.
JP4333080A 1980-04-02 1980-04-02 Phase comparator Granted JPS56140707A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4333080A JPS56140707A (en) 1980-04-02 1980-04-02 Phase comparator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4333080A JPS56140707A (en) 1980-04-02 1980-04-02 Phase comparator

Publications (2)

Publication Number Publication Date
JPS56140707A true JPS56140707A (en) 1981-11-04
JPH023564B2 JPH023564B2 (en) 1990-01-24

Family

ID=12660812

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4333080A Granted JPS56140707A (en) 1980-04-02 1980-04-02 Phase comparator

Country Status (1)

Country Link
JP (1) JPS56140707A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5185353A (en) * 1975-01-24 1976-07-26 Nippon Electric Co KOHEI KOKAIRO

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5185353A (en) * 1975-01-24 1976-07-26 Nippon Electric Co KOHEI KOKAIRO

Also Published As

Publication number Publication date
JPH023564B2 (en) 1990-01-24

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