Amplifiers – Combined with automatic amplifier disabling switch means
Patent
1981-08-04
1984-01-24
Mullins, James B.
Amplifiers
Combined with automatic amplifier disabling switch means
330252, H03F 114, H03F 345
Patent
active
044279493
ABSTRACT:
The muting circuit of the present invention comprises a first and second differential amplifier. The first differential amplifier comprises first and second transistors. The base electrode of the first transistor receives an input signal. The second differential amplifier comprises third and fourth transistors. The collector electrode of the third transistor is connected to the collector electrode of the second transistor, while the collector electrode of the fourth transistor is connected to the collector electrode of the first transistor. A switching circuit, receiving an intercepting signal, is coupled to the first and second differential amplifier. In the absence of an intercepting signal, the switching circuit causes the conduction of the first differential amplifier, and while cutting off the second differential amplifier. Upon receiving an intercepting signal, the switching circuit cuts off the first differential amplifier while it causes the conduction of second differential amplifier. Furthermore, the switching circuit causes the simultaneous conduction of the first and second differential amplifiers during a rising time and falling time of the intercepting signal. A D.C. fluctuation in the output voltage is produced during the time one amplifier is being activated while the other is being cut off. The simultaneous operation of both differential circuits prevents D.C. fluctuations in input voltage supplied to an output transistor. Consequently, the D.C. output potential of an output amplifier does not substantially fluctuate irrespective of the intercepting operation.
REFERENCES:
patent: 3875522 (1975-04-01), Hoefi
Kodera Yasuhiro
Yamaguchi Hiroyasu
Mullins James B.
Tokyo Shibaura Denki Kabushiki Kaisha
Wan Gene
LandOfFree
Signal intercepting circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Signal intercepting circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Signal intercepting circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1289682