Potential detecting circuit and semiconductor integrated circuit

Details Potential detecting circuit and semiconductor integrated circuit Potential detecting circuit and semiconductor integrated circuit

1998-04-06

2000-07-18

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 81, H03K 5153

Patent

active

060912685

ABSTRACT:
A constant current source (1) is provided between a power supply (.sup.V CC) and an intermediate node (N1) and supplies a reference current (IR) which is a constant current between the power supply (.sup.V CC) and the intermediate node (N1). A variable resistor (2) is provided between the intermediate node (N1) and a comparison potential (VL) and its resistance value can be set to a desired value. A current flowing in the variable resistor (2) is a comparison current (IC). An amplifier (3) has an input connected to the intermediate node (N1) and amplifies a potential from the intermediate node (N1) to output a level detection signal (GE). Having this configuration, a potential detecting circuit which ensures a stable and controllable detection level is provided.

REFERENCES:
patent: 4749880 (1988-06-01), Kobatake
patent: 4812681 (1989-03-01), Pumphrey
patent: 4964082 (1990-10-01), Sato et al.
patent: 5113088 (1992-05-01), Yamamoto et al.
patent: 5130577 (1992-07-01), Neidorff et al.
patent: 5191235 (1993-03-01), Hara
patent: 5243228 (1993-09-01), Maruyama et al.
patent: 5270583 (1993-12-01), Miyawaki et al.
patent: 5270584 (1993-12-01), Koshikawa et al.
patent: 5278458 (1994-01-01), Holland et al.

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