JPH0179115U

JPH0179115U -

Info

Publication number: JPH0179115U
Application number: JP1987175554U
Authority: JP
Priority date: 1987-11-17
Filing date: 1987-11-17
Publication date: 1989-05-26

Description

[Brief explanation of the drawing]

第１図は本考案の直流レベル調整回路を示す回
路図、第２図は同回路の一状態を示す等価回路図
である。１，２，３，４……第１〜第４の直列回路、６
，８，１０，１２……電子スイツチ、１４，１５
……比較器、１６，１７，１８，１９……分圧用
抵抗、２１……選択用スイツチ、２２，２３，２
４，２５……スイツチングトランジスタ。 FIG. 1 is a circuit diagram showing a DC level adjustment circuit of the present invention, and FIG. 2 is an equivalent circuit diagram showing one state of the same circuit. 1, 2, 3, 4...first to fourth series circuits, 6
, 8, 10, 12...electronic switch, 14, 15
... Comparator, 16, 17, 18, 19 ... Voltage dividing resistor, 21 ... Selection switch, 22, 23, 2
4,25...Switching transistor.

Claims

[Scope of utility model registration request]

a first resistor and a first electronic switch;
a second series circuit consisting of a second resistor and a second electronic switch, a third series circuit consisting of a third resistor and a third electronic switch, a fourth resistor and a fourth electronic switch. a fourth series circuit consisting of a variable resistor, a first comparison means, a second comparison means, and a control means for controlling the comparison means, the first series circuit, the variable resistor and the second A series circuit is connected in series between a power supply and a ground, third and fourth series circuits are connected in parallel to the first and second series circuits, respectively, and control terminals of the first and fourth series circuits are connected in parallel. the control terminals of the second and third series circuits are commonly connected and connected to the output terminal of the first comparison means; A DC level adjustment circuit, characterized in that a control signal is applied to each input end of the first and second comparison means, and a predetermined level is derived from the variable resistor.