Radio frequency amplifier

Details Radio frequency amplifier Radio frequency amplifier

1993-12-29

1995-03-07

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330284, H03G 330

Patent

active

053961927

ABSTRACT:
An amplification arrangement comprises an electrical circuit that includes a voltage divider having a plurality of resistors connected in series between a signal output and a reference potential source, and a plurality of parallel branches each extending between a common main input and a different one of a plurality of voltage divider nodes situated between the resistors. A multiplier is interposed in each of the branches and has a multiplication factor that is connected through a switching device with an electrical signal source. The switching device routes the electrical signals from the source to the different multipliers in dependence on the magnitude of a gain control signal supplied to its control input and indicative of the area of the gain range in which the arrangement is to operate at that time to obtain the desired signal amplification.

REFERENCES:
patent: 4641368 (1987-02-01), Sullivan
patent: 4704738 (1987-11-01), Graziadei et al.
IBM Technical Disclosure Bulletin vol. 32, No. 7, Dec. 1989 pp. 317-319.

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