JPS6372937U

JPS6372937U -

Info

Publication number: JPS6372937U
Application number: JP16671886U
Authority: JP
Priority date: 1986-10-31
Filing date: 1986-10-31
Publication date: 1988-05-16

Description

[Brief explanation of drawings]

第１図は、この考案の位相比較器の第一実施例
を示す回路図、第２図は、この考案の位相比較器
と共に用いて好適なタイミング抽出回路を示す図
、第３図Ａ〜Ｇは、この考案の第一実施例の位相
比較器の動作説明に供するタイミングチヤート、
第４図は、この考案の位相比較器の第二実施例を
示す回路図、第５図は、この考案の位相比較器の
第三実施例を示す回路図、第６図は、この考案の
位相比較器の第三実施例を示す回路図である。１１，１３…位相比較器の入力端子、２０…パ
ルス発生回路、２１，２３…論理積回路、２５…
インバータ、４０…制御信号発生回路、４１…第
一スイツチ素子、４３…第二スイツチ素子、５１
…第一抵坑器、５３…第二抵抗器、５５…抵抗器
、５７…コンデンサ、６１…出力端子、１０１…
コンデンサ、１０３…演算増幅器。 FIG. 1 is a circuit diagram showing a first embodiment of the phase comparator of this invention, FIG. 2 is a diagram showing a timing extraction circuit suitable for use with the phase comparator of this invention, and FIGS. 3 A to G is a timing chart for explaining the operation of the phase comparator of the first embodiment of this invention,
Fig. 4 is a circuit diagram showing a second embodiment of the phase comparator of this invention, Fig. 5 is a circuit diagram showing a third embodiment of the phase comparator of this invention, and Fig. 6 is a circuit diagram showing a third embodiment of the phase comparator of this invention. FIG. 3 is a circuit diagram showing a third embodiment of a phase comparator. 11, 13... Input terminal of phase comparator, 20... Pulse generation circuit, 21, 23... AND circuit, 25...
Inverter, 40... Control signal generation circuit, 41... First switch element, 43... Second switch element, 51
...first resistor, 53...second resistor, 55...resistor, 57...capacitor, 61...output terminal, 101...
Capacitor, 103... operational amplifier.

Claims

[Claims for Utility Model Registration] (1) In a phase comparator for outputting a control signal from an output signal from a voltage controlled oscillator and a continuous or burst digital signal, the phase lead of the output signal with respect to the digital signal. and a pulse generation circuit that generates lead pulses and lag pulses representing lag, and a control signal that is provided between the first and second reference voltage points and whose voltage level is varied in response to the lead pulse and lag pulse. A phase comparator comprising a control signal output circuit. (2) The control signal output circuit includes a first switch element having one terminal connected to the first reference voltage point and turned on and off by the advance pulse, and one terminal connected to the second reference voltage point. A series circuit of second switch elements connected to each other and turned on and off by the delayed pulse, and an integrating circuit connected to a connection point of the first and second switch elements and outputting a control signal. A phase comparator according to claim 1 of the utility model registration claim.