Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1990-06-07
1992-07-28
Zazworsky, John
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307268, 307358, 307475, 307494, 330302, H03K 508, H03K 1700, H03F 304
Patent
active
051343096
ABSTRACT:
A preamplifier providing adequate boost even to weak and small input currents, and thus achieving favorable gain and signal-to-noise ratio. An input current is converted to a voltage, which is provided to a differential amplification section. A phase-adjusted version of that voltage signal also is provided to the differential amplifier, the differential amplifier thus outputting an amplified signal based on the phase difference between its inputs. The preamplifier may be incorporated on a single chip, using MOS transistors or gallium arsenide techniques. A level clamping device may be provided in the event that the input current exceeds a predetermined value. The inventive preamplifier also may be incorporated advantageously into a waveform shaping circuit.
Kimura Hideaki
Matsumoto Motoaki
Fuji Photo Film Co. , Ltd.
Zazworsky John
LandOfFree
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