Device for adjusting the minimal and maximal frequencies of a frequency modulated video signal
Device for adjusting the frequencies fmin and fmax of a frequency-modulated video signal, comprising in series an automatic gain-control amplifier (1), a luminance-signal processing circuit (3), a variable-gain amplifier (4), an adder (5), a voltage-controlled oscillator (6), and further comprising:...
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| Format: | Patent |
| Sprache: | eng ; fre ; ger |
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| Zusammenfassung: | Device for adjusting the frequencies fmin and fmax of a frequency-modulated video signal, comprising in series an automatic gain-control amplifier (1), a luminance-signal processing circuit (3), a variable-gain amplifier (4), an adder (5), a voltage-controlled oscillator (6), and further comprising:… - an insertion circuit (2), a reference frequency fmin and fmax generator (7), a discriminating circuit (8), a comparator (9), and a switch (10) for the purpose of servocontrolling the modulated output signal from the oscillator, either through the reference frequency fmin, or through the reference frequency fmax. … Application to video recorders. …… |
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