High side, current sense amplifier using a symmetric amplifier

Details High side, current sense amplifier using a symmetric amplifier High side, current sense amplifier using a symmetric amplifier

1994-09-30

1996-03-12

Wambach, Margaret Rose

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 28, 327 63, H03K 1920

Patent

active

054989841

ABSTRACT:
A self-contained, bi-polar high-side current sense amplifier which detects the magnitude and polarity of current flowing from one device to another, is disclosed. The amplifier has a symmetric architecture having two inputs and two outputs. One output is active for positive input signals corresponding to current flow in one direction, and the other output is active for negative input signals corresponding to current flow in an opposite direction. A symmetric current mirror in the amplifier provides the OR'ing function required to provide only one output at a time. The amplifier also utilizes aluminum sense and gain resistors, which allows cancellation of resistor temperature coefficients.

REFERENCES:
patent: 5432731 (1995-07-01), Kirsch et al.

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