Integrated amplifier having a voltage-controlled current source

Details Integrated amplifier having a voltage-controlled current source Integrated amplifier having a voltage-controlled current source

1999-04-22

2000-09-05

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including particular biasing arrangement

327530, H03F 304

Patent

active

061149128

ABSTRACT:
The voltage-controlled current source receives a control voltage from an operational amplifier which itself receives a reference voltage at one input from a bias circuit. The voltage-controlled current source applies current to the base of the amplifier's main transistor. The base of the transistor is also coupled to the input node of the amplifier through a DC-blocking capacitor and through a feedback loop to the other input of the operational amplifier. The voltage-controlled current source operates to maintain the voltage at the base of the transistor relatively constant for a wide range of input signal levels. As a result, the amplifier is able to operate at relatively low power supply voltages (e.g., as low as 2V) without suffering from premature gain compression at relatively high input signal levels (e.g., as high as 0.4V).

REFERENCES:
patent: 4042889 (1977-08-01), Baker
patent: 5654672 (1997-08-01), Bailey et al.
patent: 5760651 (1998-06-01), Wong
"An Integrated Silicon Bipolar Receiver Subsystem for 900 MHz ISM Band Applications, " by Jeff Durec, IEEE BCTM 3.2, Sep 28-30, 1997, pp. 57-60.
"A 2.7-5.5V 0.2-1W BiCMOS RF Driver Amplifier IC with Closed-loop Power Control and Biasing, "by S. Wong, S. Luo, and L. Hadley, IEEE ISSCC 98, Session 3, Transceivers and Power Amplifiers/ Paper TP 3.5, Feb. 5, 1998, pp. 52-53.
"High-Frequency Nonlinearity Analysis of Common-Emitter and Differential-Pair Transconductance Stages, " by Ken Leong Fong and Robert G. Meyer, IEEE Journal f Solid-State Circuits, vol. 33, No. 4, Apr. 1998, pp. 548-555.

Affiliated with

Also associated with

Rating

Integrated amplifier having a voltage-controlled current source does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Integrated amplifier having a voltage-controlled current source, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integrated amplifier having a voltage-controlled current source will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2216234