Television – Television transmitter circuitry – Modulator
Patent
1993-12-03
1996-07-09
Metjahic, Safet
Television
Television transmitter circuitry
Modulator
348536, 358330, 358324, 358337, H04N 5922, H04N 592, H04N 540
Patent
active
055349439
ABSTRACT:
A frequency modulating system for frequency-modulating an input signal with a predetermined carrier frequency comprising a controller circuit and a frequency modulator. The controller circuit includes an automatic frequency detecting circuit, a voltage controlled oscillator, an error current generator, a feedback clamping circuit, a deviation current generator, and an adder circuit generating a frequency deviation/carrier frequency correction signal provided to the frequency modulator. The frequency modulator modulates the frequency in response to an output of the controller circuit and includes an oscillator having the same structure as that of the voltage control oscillator.
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patent: 4752833 (1988-06-01), Wolber
patent: 5079525 (1992-01-01), Ishikawa et al.
patent: 5093634 (1992-03-01), Khoury
patent: 5181117 (1993-01-01), Choi et al.
patent: 5231507 (1993-02-01), Sakata et al.
patent: 5267023 (1993-11-01), Kawasaki
patent: 5323242 (1994-06-01), Yamamoto et al.
patent: 5347240 (1994-09-01), Park
Metjahic Safet
Samsung Electronics Co,. Ltd.
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