Amplifier with current-voltage conversion, particularly preampli

Details Amplifier with current-voltage conversion, particularly preampli Amplifier with current-voltage conversion, particularly preampli

1984-10-16

1986-06-10

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Integrated circuits

330293, H03F 132

Patent

active

045945624

ABSTRACT:
A problem encountered in the design of preamplifiers of optical receivers, e.g., of so-called transimpedance amplifiers, is to achieve both a wide bandwidth and high sensitivity. The invention solves this problem primarily by a specific implementation and placement of the feedback resistor in the transimpedance amplifier type, and of the load resistor in the high-impedance amplifier type which permit a high resistance value and very low series and shunt capacitances. The resistor consists of a resistive strip (1) and conductive strips (2, 3) deposited on a substrate, the conductive strips extending parallel to the resistive strip and each having one end connected to one end of the resistive strip. To reduce shunt capacitances, the substrate is located at a distance from the metallic amplifier case and from the amplifier board.

REFERENCES:
patent: 4464630 (1984-08-01), Eddins

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