| 摘要 |
<p>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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