Amplifier circuit suitable for use in a radiotelephone

Details Amplifier circuit suitable for use in a radiotelephone Amplifier circuit suitable for use in a radiotelephone

1993-12-13

1995-04-25

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including current mirror amplifier

330296, H03F 316

Patent

active

054102758

ABSTRACT:
The amplifier uses transistors such as (metal oxide semiconductor field effect transistors) MOSFET transistors in a current mirror configuration. The MOSFET transistors are easy to package as surface mount devices. The output power of the amplifier is controlled by controlling the bias current flowing through the amplifier stage. Additionally, the amplifier has low sensitivity to the variations of the bias current to the control signal threshold. These characteristics make the amplifier ideal for use in a radio transmitter, such as a radiotelephone.

REFERENCES:
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patent: 4896061 (1990-01-01), Ahmed
patent: 4975632 (1990-12-01), James et al.
patent: 4990976 (1991-02-01), Hattori
patent: 5027251 (1991-06-01), Hirota et al.
patent: 5079456 (1992-01-01), Kotowski et al.
patent: 5126688 (1992-06-01), Nakanishi et al.
patent: 5160898 (1992-11-01), Black
patent: 5220290 (1993-06-01), Black
Gregorian, Roubik and Temes, Gabor C. Analog MOS Integrated Circuits for Signal ProcessingJohn Wiley & Sons, Inc., 1986, pp. 126-140.

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