Amplifiers – Miscellaneous – Amplifier protection means
Patent
1977-10-26
1979-03-13
Dahl, Lawrence J.
Amplifiers
Miscellaneous
Amplifier protection means
330 10, 330251, H03F 3217, H03F 338
Patent
active
041445023
ABSTRACT:
A negative feedback operation of a PWM-type amplifier is stabilized by the use of a resistor. The input signal is voltage-compared with the triangular wave of a higher frequency than the input signal to form a PWM-signal, which is, in turn, power amplified and is provided to a load after demodulated by a low-pass-filter. A part of the output voltage is fed back from a common connection point of an inductor and a capacitor of an LC-filter forming the low-pass filter. A resistor is connected in series with the capacitor, and the negative feedback operation is, thereby, stabilized.
REFERENCES:
patent: 3386046 (1968-05-01), Myer
patent: 4059807 (1977-11-01), Hamada
Dahl Lawrence J.
Sansui Electric Co. Ltd.
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