A frequency multiplier

A frequency multiplier of a character generating circuit is disclosed, wherein two frequency doublers which include a phase inverter (30) for inverting a phase by inputting a color sub-carrier signal, a 90 DEG phase shifter (40) for shifting a phase by 90 DEG by inputting the color sub-carrier signa...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	CHON, BYUNG-HOAN, KWON, SUNG-SUB, MIN, SUNG-KI
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BASIC ELECTRONIC CIRCUITRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY GENERATION OF NOISE BY SUCH CIRCUITS GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER PICTORIAL COMMUNICATION, e.g. TELEVISION PULSE TECHNIQUE
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Beschreibung
Zusammenfassung:	A frequency multiplier of a character generating circuit is disclosed, wherein two frequency doublers which include a phase inverter (30) for inverting a phase by inputting a color sub-carrier signal, a 90 DEG phase shifter (40) for shifting a phase by 90 DEG by inputting the color sub-carrier signal, and an analog multiplier (50) for outputting a doubled signal that multiplies the output of the phase inverter by the output of the 90 DEG phase shifter, are connected in series so as to generate a clock to create a blue screen, to thereby reduce product cost and noise.