Digitally controlled RF amplifier with wide dynamic range...

Details Digitally controlled RF amplifier with wide dynamic range... Digitally controlled RF amplifier with wide dynamic range...

2006-03-21

2006-03-21

Evanisko, George R. (Department: 3762)

Surgery: light, thermal, and electrical application

Light, thermal, and electrical application

Electrical therapeutic systems

C607S057000

Reexamination Certificate

active

07016738

ABSTRACT:
A push-pull amplifier efficiency provides a 4:1 (12 dB) course adjustment of power output by using a single digital control input. The amplifier is provided with an input voltage (VDD) having sixteen steps ranging from 1.25 volts to 3.00 volts. Based on the digital control, an integrated circuit switches between a high power mode and a low power mode. In the low power mode, the output voltage is equivalent to the input voltage. In the high power mode, the amplifier provides an output of twice the input voltage (or four times the power).

REFERENCES:
patent: 3751605 (1973-08-01), Michelson
patent: 4400590 (1983-08-01), Michelson
patent: 4532930 (1985-08-01), Crosby et al.
patent: 4592359 (1986-06-01), Galbraith
patent: 4947844 (1990-08-01), McDermott
patent: 5824022 (1998-10-01), Zilberman et al.
patent: 5957958 (1999-09-01), Schulman et al.

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