Lg Electronics Inc.

Clarion Co

Suntory Limited

Kenji Arima

Hiroshi Igarashi

Nobuo Tsuruoka

Tatsuya Kurihara

Shigekazu Matsukura

Toshio Kishida

Kunihiro Yoshizawa

Tatsuro Nishihara

Takeo Takemura

A standby power supply circuit with a low power consumption including: a voltage converter for rectifying a commercially used AC power source to convert it to a DC voltage; a standby power supplier for receiving the DC voltage from the voltage converter; a voltage comparator for comparing the DC voltage outputted from the voltage converter with pre-set reference voltages and outputting a predetermined pulse signal; and a switch unit for ON/OFF controlling the operation of the voltage converter according to a pulse signal outputted from the voltage comparator. With the construction, a zero cross switch is intermittently turned on or turned off, so that the standby transformer is turned on or turned off, by which the standby power can be reduced when the electric instruments are in a standby state.

Power supply for consuming lower power in a standby mode

A horizontal S-shaped correction signal circuit having a correction condenser disposed in a cathode ray tube (CRT) horizontal deflection circuit such as in a television receiver, a display monitor, etc. In particular, a horizontal S-shaped correction signal circuit which is capable of obtaining an accurate correction effect and a desired adjustment. The total capacitance of the correction condenser C.sub.S for a horizontal deflection circuit is variable by selectively connecting in parallel therewith correction condensers C.sub.S1 and C.sub.S2 by switches SW.sub.1 and SW.sub.2 during the scanning interval. Therefore, the correction characteristic is improved. Namely, it is possible to obtain a highly accurate S-shaped correction signal. In addition, it is possible to independently control the width of the front portion and rear portion of the horizontal scanning interval by controlling externally inputted direct control current signals DA-C.sub.TL1 and DA-C.sub.TL2. Furthermore, it is possible to vary the S-shaped correction signal width depending on the vertical scan position on the screen.

Horizontal deflection S-shaped correction signal circuit with variable

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AGC system for a television receiver having a keyed AGC circuit, a peak or average AGC circuit and a switching circuit between a video signal intermediate frequency amplifier circuit and an video signal detection circuit, wherein automatic gain control (AGC) for video signals is effected by the keyed AGC circuit, which is commuted by using the switching circuit after having had the peak or average AGC circuit operated at the switch-on moment of the power supply.

AGC System for a television receiver

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Tokyo, Japan

Kenji Arima