Differential preamplifier and pre-emphasis network

Details Differential preamplifier and pre-emphasis network Differential preamplifier and pre-emphasis network

1994-10-07

1997-04-29

Mullins, James B.

Amplifiers

With amplifier condition indicating or testing means

330 69, 330 84, 330260, 330298, 330306, 367131, 367134, 367135, 367901, H03F 345, H04B 1100

Patent

active

056253206

ABSTRACT:
A preamplifier and pre-emphasis network is provided having a differential plifier exhibiting common mode noise rejection. The preamplifier is particularly suited for use with a double-sided sensor element and it includes a double-sided, balanced calibration circuit. First and second variable gain buffers are joined to the differential amplifier for preventing current noise degradation at the differential amplifier inputs. A pre-emphasis network is further provided in conjunction with the variable gain buffers for providing balanced differential gain of the sensor element signal. Further elements of the invention provide for high and low pass filtering, and differential buffering of the output signal.

REFERENCES:
patent: 3939468 (1976-02-01), Mastin
patent: 4242741 (1980-12-01), Parrish
patent: 4320351 (1982-03-01), Brown, Jr. et al.
patent: 4679002 (1987-07-01), Sherwin et al.
patent: 5300896 (1994-04-01), Suesserman

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