Voltage divider circuit, differential amplifier circuit and semi

Details Voltage divider circuit, differential amplifier circuit and semi Voltage divider circuit, differential amplifier circuit and semi

1998-04-08

1999-02-09

Berhane, Adolf Denske

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323280, G05F 316

Patent

active

058699570

ABSTRACT:
A voltage divider circuit comprises first and second transistor pairs 1 and 2 connected in series between a first standard voltage terminal VD and a second standard voltage terminal VS, and feedback control circuit 3. Each of transistor pairs comprises two NMOS transistors with the same electric characteristics, respectively. A divided ratio is set by a voltage applied to the gate terminals of these NMOS transistors M1-M4. Feedback-control circuit 3 comprises a load transistor pair 4 and an operational amplifier OP1. The circuit 3 performs feedback-control so that a voltage of connection lines L1 and L2 which connects first and second pairs of transistors becomes equal. Therefore, a high accurate divided voltage is outputted from between pairs 1 and 2 of transistors.

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patent: 5686821 (1997-11-01), Brokaw

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