Shielded amplifier

Details Shielded amplifier Shielded amplifier

1982-03-04

1984-06-12

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Integrated circuits

H03F 314

Patent

active

044544812

ABSTRACT:
A shielded amplifier adapted for use with an infrared detector array mounted on a focal plane and operating in a cryogenically cooled environment and adapted to receive a signal output from a high impedance signal source, the shielded amplifier being required to amplify the signal with relatively uniform gain over a predetermined bandwidth comprising a base substrate of semiconductor material, an integrated amplifier circuit means formed on the base substrate, a resistor connected for negative feedback between the output terminal and the input terminal, a conductive shield interposed between the resistor and the integrated amplifier circuit means, a first insulating means for insulating the resistor from the conductive shield, a second insulating means for insulating the conductive shield from the integrated circuit amplifier means; whereby the conductive shield is disposed to reduce stray parasitic capacitance thereby increasing the shielded amplifier uniform gain over a predetermined bandwidth.

REFERENCES:
patent: 4079337 (1978-03-01), Lundgren et al.

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