JPH02130124U

JPH02130124U -

Info

Publication number: JPH02130124U
Application number: JP3970189U
Authority: JP
Priority date: 1989-04-04
Filing date: 1989-04-04
Publication date: 1990-10-26

Description

[Brief explanation of drawings]

第１図はこの考案による三角波発生装置の全体
構成図、第２図はこの考案による一実施例の電気
接続を示す回路図、第３図はこの考案の回路各部
の電圧変化を示したタイミング図、第４図は従来
の三角波発生装置の一例を示す図、第５図は従来
の回路各部の電圧変化を示したタイミング図であ
る。図において、１……積分器、２……電圧比較手
段、４……基準電圧切換手段である。なお、各図
中同一符号は同一または相当部分を示す。 Fig. 1 is an overall configuration diagram of a triangular wave generator according to this invention, Fig. 2 is a circuit diagram showing electrical connections of an embodiment of this invention, and Fig. 3 is a timing diagram showing voltage changes in various parts of the circuit according to this invention. , FIG. 4 is a diagram showing an example of a conventional triangular wave generator, and FIG. 5 is a timing chart showing voltage changes at various parts of the conventional circuit. In the figure, 1...integrator, 2...voltage comparison means, 4...reference voltage switching means. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims

[Scope of utility model registration request]

In a triangular wave generation device using an integrator using an operational amplifier, a first reference voltage source, a second reference voltage source lower than the first reference voltage source, and one of these reference voltages and the integrator. voltage comparison means for comparing the magnitude with the output voltage;
between the reference voltage source and the second reference voltage source and the voltage comparison means, the output of the voltage comparison means is used as a switching signal, and when the integrator output voltage is lower than the reference voltage, the first reference voltage source is A triangular wave generator comprising: reference voltage switching means for selecting the second reference voltage source when the second reference voltage source is not selected.