Amplification of signals from high impedance sources

Details Amplification of signals from high impedance sources Amplification of signals from high impedance sources

1997-03-24

1999-03-02

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330282, H03G 330

Patent

active

058776125

ABSTRACT:
An analog signal conditioner for signals from high impedance sources adap for ready implementation as an integrated circuit. The signal conditioner includes a preamplifier, a step gain amplifier and a low-pass filter. A calibration generator can inject a calibration signal into the system. The step gain amplifier includes analog switches that control paths through a voltage divider network to provide negative feedback on both sides of a fully differential operational amplifier. The design of the feedback networks minimizes the total resistance on the integrated circuit.

REFERENCES:
patent: 4509021 (1985-04-01), van Uden
patent: 4855685 (1989-08-01), Hochschild
patent: 5285169 (1994-02-01), Theus
patent: 5412346 (1995-05-01), Burger et al.

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