Amplifiers – With control of power supply or bias voltage – With control of input electrode or gain control electrode bias
Patent
1978-12-19
1980-09-16
Mullins, James B.
Amplifiers
With control of power supply or bias voltage
With control of input electrode or gain control electrode bias
330134, 330279, H03G 300
Patent
active
042232740
ABSTRACT:
An amplifier is disclosed for electrical signals which consists of a plurality of series-connected amplification stages each of which has at least one voltage-controlled amplifier element whose control characteristic can be adjusted by means of a control signal. An amplification is desirable for all individual stages which is equally great over an arbitrarily preselectable dynamic range. According to the invention, the amplifier has at least one control signal forming element for each of the amplifier elements of each amplification stage which exhibit different control characteristics compared to one another. This control signal forming element forms a secondary control voltage U.sub.ST2 from a primary control voltage U.sub.ST1 according to the equation U.sub.ST2 =m.multidot.U.sub.ST1 +n; m and n representing forming magnitudes which can be individually differently adjusted for each amplifier element at the control signal forming element so that differences in the control characteristic courses are compensated for by adjusting to a commonly prescribable characteristic. The amplifier is useful as a depth compensation amplifier in the ultrasonic impulse echo image technique.
REFERENCES:
patent: 3015076 (1961-12-01), Sheehan
patent: 3802776 (1974-04-01), Tehang
Paulke Bodo
Walz Alfred
Mullins James B.
Siemens Aktiengesellschaft
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