Circuit technique for eliminating impact ionization in a differe

Details Circuit technique for eliminating impact ionization in a differe Circuit technique for eliminating impact ionization in a differe

1986-11-14

1988-04-26

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

307200B, 330261, 330298, H03F 152, H03F 345

Patent

active

047407603

ABSTRACT:
An additional device is provided in parallel with one of the input devices of a differential pair. A fixed bias voltage, which is slightly less than the midpoint of the swing range of the input voltage to the differential pair, is applied to the gate of the added device. During the positive swing of the input, the added device remains off and does not effect performance. When the input voltage becomes lower than the fixed bias voltage, the added device turns on and conducts all current needed by the current source, leaving the differential input devices off, and eliminating impact ionization in the differential pair.

REFERENCES:
patent: 4460874 (1984-07-01), Haque

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