Amplification of Signals from high Impedance Sources
Patent, Filed 24 Mar 97, patented 2 Mar 99
DEPARTMENT OF THE NAVY WASHINGTON DC
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An analog signal conditioner for signals from high impedance sources adapted 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.
- Electrical and Electronic Equipment