Amplifiers – Combined with automatic amplifier disabling switch means
Patent
1992-03-19
1993-10-12
Mottola, Steven
Amplifiers
Combined with automatic amplifier disabling switch means
330 85, H03F 114
Patent
active
052529282
ABSTRACT:
The invention relates to a charge amplifier circuit with a control loop for resetting, which for minimizing the leakage currents that falsify the measuring results includes two diodes (D.sub.1) and (D.sub.2), connected antiparallel in the loop and constituting input protection diodes of an integrated circuit (ISK). In the operating (measuring) phase the diode resistance (R.sub.D) is extremely high and the voltage drop over the diode pair is small, so that no significant leakage current gets through onto the charge amplifier input IN.sub.Q. In the reset phase the diode resistance (R.sub.Dr) is practically nil.
REFERENCES:
patent: 3582675 (1971-06-01), Jordan et al.
patent: 3588729 (1971-06-01), Satterfield
patent: 3758872 (1973-09-01), Diddens
patent: 4218662 (1980-08-01), Schroder
Kistler Instrumente AG
Mottola Steven
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