Differential transimpedance amplifier

Details Differential transimpedance amplifier Differential transimpedance amplifier

1997-06-12

1999-05-04

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330260, H03F 345

Patent

active

059007796

ABSTRACT:
A differential transimpedance amplifier with reduced input impedance and increased bandwidth having a pair of input contacts, a pair of summing transistors, a pair of feedback transistors, a pair of output resistors, a pair of feedback resistors, a first and a second node and a pair of output contacts. The input contacts each being connected to one or more sources of current that are to be summed and are connected to the pair of summing transistors. The pair of feedback transistors are connected to the pair of input contacts, the pair of feedback resistors and to the first node for differentially reducing the input impedance of the pair of summing transistors and to overcome voltage excursions at the pair of input contacts to increase the operational bandwidth of the transimpedance amplifier. The pair of output resistors are connected to the pair of summing transistors for converting the current sum for each input contact into a voltage level that is transmitted differentially by the pair of output contacts that are connected to the pair of summing transistors.

REFERENCES:
patent: 4232271 (1980-11-01), Dobkin et al.
patent: 4268798 (1981-05-01), Reichart
patent: 5627494 (1997-05-01), Somerville

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