Procedure and circuit device for the subtraction of...

Details Procedure and circuit device for the subtraction of... Procedure and circuit device for the subtraction of...

2006-01-24

2008-12-30

Mottola, Steven J (Department: 2817)

Amplifiers

Sum and difference amplifiers

C327S361000

Reexamination Certificate

active

07471145

ABSTRACT:
The invention relates to a procedure and a circuit device for the subtraction of electrical signals, with at least two regulating loops each comprising at least one amplifier unit. Advantageously, the circuit device comprises a device for subtracting a signal, made available by the circuit device and representing the difference between the electrical signals, from one of the electrical signals. In a preferred embodiment of the invention, the potentials on lines carrying the electrical signals are maintained at the same value with the help of a first one or of the regulating loops.

REFERENCES:
patent: 4683441 (1987-07-01), Naylor
patent: 5841311 (1998-11-01), Koike
Kim, J. et al. (1994). “MOS Active Attenuators for Analog ICs and their Applications to Finite Gain Amplifiers,”IEEE International Symposium on Circuits and Systems, pp. 701-704.

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