Signal conditioning circuit apparatus and method

Details Signal conditioning circuit apparatus and method Signal conditioning circuit apparatus and method

1995-12-20

1998-08-11

Williams, Hezron E.

Measuring and testing

Vibration

Sensing apparatus

327563, 327562, 330257, 330260, 330261, 330296, C01H 100, H03F 345

Patent

active

057929564

ABSTRACT:
Apparatus and method utilized in conditioning an input signal from a transducer operatively coupled to a machine by self-biasing a circuit including an op-amp having an inverting signal input terminal, a non-inverting signal input terminal, bias voltage terminals and a signal output terminal. A power supply is operatively coupled to the bias voltage terminals via a single pair of supply lines and an input signal is directed to an input terminal of the op-amp. The op-amp outputs a conditioned signal to the supply lines which is superimposed with said DC bias voltage across the supply lines wherein the characteristics of the conditioned signal may be monitored via the supply lines.

REFERENCES:
patent: 3860481 (1975-01-01), Gopal et al.
patent: 4328441 (1982-05-01), Kroeger, Jr. et al.
patent: 4350959 (1982-09-01), Rosenbaum
patent: 4479093 (1984-10-01), Mattisson
patent: 4739280 (1988-04-01), Noro
patent: 4843344 (1989-06-01), Cox

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