Transistor biasing independent of inductor voltage drop

Details Transistor biasing independent of inductor voltage drop Transistor biasing independent of inductor voltage drop

2007-06-19

2007-06-19

Mottola, Steven J. (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including differential amplifier

C330S283000

Reexamination Certificate

active

11078246

ABSTRACT:
A differential amplifier can include input transistors for receiving a differential input signal and an inductor connected to the input transistors. The inductor can protect a voltage supply from radio frequency in the differential input signal. The accuracy of this differential amplifier can be significantly improved by including a bias network. This bias network advantageously allows a bias current in the input transistors to be set independently of a voltage drop across the inductor.

REFERENCES:
patent: 3987317 (1976-10-01), Hongu et al.
patent: 6023196 (2000-02-01), Ashby et al.
patent: 6255885 (2001-07-01), Brandt
patent: 7071779 (2006-07-01), Shi et al.

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