JPS63198223U

JPS63198223U -

Info

Publication number: JPS63198223U
Application number: JP8996687U
Authority: JP
Priority date: 1987-06-11
Filing date: 1987-06-11
Publication date: 1988-12-20

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例を示すブロツク図、
第２図は従来の発振回路の一例を示す回路図、第
３図は第２図の応用例を示す回路図である。６……スイツチ用トランジスタ、１，２，７，
８，１０……トランジスタ、９……コンデンサ、
１１，１２……コンパレータ、１３……フリツプ
フロツプ、２０……切換スイツチ、２１……可変
抵抗器、２２，２４……固定抵抗器、２３，２５
……ダイオード。 FIG. 1 is a block diagram showing an embodiment of the present invention.
FIG. 2 is a circuit diagram showing an example of a conventional oscillation circuit, and FIG. 3 is a circuit diagram showing an example of application of FIG. 6...Switch transistor, 1, 2, 7,
8, 10...transistor, 9...capacitor,
11, 12... Comparator, 13... Flip-flop, 20... Changeover switch, 21... Variable resistor, 22, 24... Fixed resistor, 23, 25
……diode.

Claims

[Claims for Utility Model Registration] A switch that is driven to open and close according to the terminal voltage of a capacitor; a first transistor that charges the capacitor when the switch is open; and a first transistor that charges the capacitor when the switch is closed; A second transistor that discharges the capacitor, a current control circuit that controls the current value of the second transistor, and a plurality of fixed selector switches that are common to the power terminal sides of these first transistors and the current control circuit. A current setting circuit whose contacts are connected via a series circuit of a resistor and a diode, and a movable contact of the changeover switch is connected to the power supply voltage line side, and the changeover switch commonly switches and sets the magnitude of the output current; An oscillation circuit comprising: