Amplifier biasing circuit

Details Amplifier biasing circuit Amplifier biasing circuit

1992-12-15

1994-08-23

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330290, 379405, H03F 345, H04M 100

Patent

active

053411080

ABSTRACT:
This amplifier biasing circuit is used in a telecommunication ring trip circuit to control the bias of a sense amplifier (SA) having input terminals (I1, I2) coupled to output terminals (A, B) of a Herter bridge (R0/R5) which is also coupled to a telecommunication line (L) and to a ringing signal source (RC). The bias circuit is a negative feedback loop coupled between terminals I1 and I1, I2 of SA and regulates the voltage at the latter terminals to a reference value when the input voltage on terminal I1 exceeds a predetermined value in one direction, by connecting a variable bias impedance (R6, PNP1, R7, PNP2) between the amplifier input terminals and VBAT.

REFERENCES:
patent: 4292478 (1981-09-01), Davis et al.
patent: 4532381 (1985-07-01), Rosenbaum et al.
patent: 5075540 (1991-12-01), Taniguchi et al.
patent: 5136259 (1992-08-01), Sato et al.

Affiliated with

Also associated with

Rating

Amplifier biasing circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Amplifier biasing circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Amplifier biasing circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-505493