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5111377 |
Interconnection for electric power system
In a power interconnection system between an electric power system and a power converter which makes AC power from a DC power source, a positive feed-back loop is constituted so as to include a...
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4476498 |
Deviation detector for FM video recording system
The deviation of an FM signal modulated by a video signal is detected by measuring the average period of the FM signal at a measurement rate proportional to the average frequency of the FM signal....
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4312020 |
Frequency response adjusting device for magnetic sound recorder
A device for adjusting the frequency response characteristic of a magnetic sound recorder at relatively low and high frequencies, wherein the signal level of the recording signal to be supplied to...
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4282497 |
Frequency modulator having linearized operation
A frequency modulator comprising an oscillator the output frequency of which is dependent upon the amplitude of a modulating signal, modulating signal control means via which the modulating signal...
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4271439 |
Electronic gain and noise control for recording of analog information
In an apparatus for analog recording having a dynamic compressor for amplifying an analog input signal wherein the gain varies in response to an applied control signal, there is provided an...
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4270151 |
Microphone mixer with predistortion indication
A new circuit for giving audible indication to an operator of sound recording equipment impending distortion of audio-signals. The circuit includes a predistortion circuit which introduces...
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3808526 |
FREQUENCY RESPONSE ANALYSER
Apparatus for analysing the frequency response of an electrical system to a test signal comprises means for generating a test signal from a digital synchronising signal, and for applying this test...
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3711771 |
RADIO-FREQUENCY POWER TESTING EQUIPMENT
Method and apparatus for measuring the peak power performance of a pulsed microwave power device as a unit-under-test, in which there is provided means for driving the unit-under-test with a...
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