Electricity: power supply or regulation systems – Output level responsive – Using a three or more terminal semiconductive device as the...
Patent
1982-11-24
1984-11-06
Wong, Peter S.
Electricity: power supply or regulation systems
Output level responsive
Using a three or more terminal semiconductive device as the...
323280, 323226, 330293, 330297, G05F 148, H03K 501
Patent
active
044814623
ABSTRACT:
An amplitude control system comprising, arranged between the input (1) and the output (2) of the system, a series arrangement of a resistor (3) and an amplifier (5). The input of the amplifier (5) is connected to a point of constant potential via the main current path of a transistor (4). The control electrode (13) of the transistor is connected to an integrator (6, 7) and is connected to the output (2) of the control system via a control loop. The control loop comprises a current source (10) which is connected to the control electrode (13) of the transistor (4) via a first switching element (8) and is also connected to a point of constant potential via a second switching element (9). The output (2) of the system is connected to one input (15) of a comparator whose other input (16) is connected to a source of reference voltage (12), the output voltage of the comparator (11) controlling the two switching elements (8, 9) such that the first switching element (8) is closed and the second switching element (9) is opened when the voltage on the one input (15) of the comparator (11) is higher than the voltage on the other input (16). The first switching element (8) is opened and the second switching element (9) is closed when the voltage on the one input (15) of the comparator (11) is lower than the voltage on the other input (16).
REFERENCES:
patent: 3463928 (1969-08-01), Murphy
patent: 3916294 (1975-10-01), Kennedy
patent: 4035738 (1977-07-01), Anzalone
patent: 4053847 (1977-10-01), Kumahara et al.
patent: 4334185 (1982-06-01), Turney et al.
Franzblau Bernard
Mayer Robert T.
U.S. Philips Corporation
Wong Peter S.
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