JPS58127732U

JPS58127732U - oscillation circuit

Info

Publication number: JPS58127732U
Application number: JP2311682U
Authority: JP
Inventors: 文彦横川; 洋一小川
Original assignee: パイオニア株式会社
Priority date: 1982-02-20
Filing date: 1982-02-20
Publication date: 1983-08-30

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は発振回路の従来例を示すブロック図、第２図は
本考案の発振回路の実施例を示す回路図、第３図は第２
図の回路の動作波形図、第４図は第　　。２図の回路の具体回路図である。゛主要部分の符号の説明、１，７・・・・・・積分回路、
２．３・・・・・・比較回路、４・・・・・・フリップ
フロップ、５．６・・・・・・カレントミラー回路。第１図第２図Fig. 1 is a block diagram showing a conventional example of an oscillation circuit, Fig. 2 is a circuit diagram showing an embodiment of the oscillation circuit of the present invention, and Fig. 3 is a block diagram showing a conventional example of an oscillation circuit.
The operating waveform diagram of the circuit shown in Fig. 4 is shown in Fig. 4. FIG. 2 is a specific circuit diagram of the circuit shown in FIG. 2;゛Explanation of symbols of main parts, 1, 7...Integrator circuit,
2.3...Comparison circuit, 4...Flip-flop, 5.6...Current mirror circuit. Figure 1 Figure 2

Claims

[Scope of utility model registration request]

(1) Voltage variable means whose output voltage increases or decreases depending on the input current, reference voltage generation means which selectively generates one of two predetermined different reference voltages, and an output voltage of the voltage variable means that a comparing means having a first transistor supplied to an input; and a second transistor having an input supplied with the reference voltage of the reference voltage generating means and differentially connected to the first transistor; a first current supply means for controlling the input current of the voltage variable means in response to on/off of the transistor; and a reference voltage for the reference voltage generation means in response to on/off of the second transistor; An oscillation circuit comprising a second current supply means.

(2) The oscillation circuit according to claim 1, wherein the first and second current supply means each include a current mirror circuit.

(3) The first current supply means includes means for supplying the first transistor with an electrode that compensates for the offset current of the current mirror circuit. oscillation circuit.

(4) The reference voltage generating means includes a push-pull connected PNP transistor and an NPN transistor to which a predetermined voltage is applied to the base and which are mutually turned on and off by the output of the second current supply means. An oscillation circuit according to claim 1, 2, or 3 of the utility model registration claim.