Sony Corporation

Isamu Inagaki

Haruo Aoki

Juho Yoneya

An image reception system is disclosed, which includes a tuner for selecting one of broadcast channels of CATV, a video detector connected to the tuner for deriving output signals having video signals and command data of the selected channel, a data fetch circuit for extracting the command data and character data out of the output signals derived from the video detector, a display controller for controling video outputs to be displayed on a display screen, and a key pad for supplying the control command to the display controller. In this case, the display controller includes a character generator for generating character signals to be displayed on the display and masking circuit for superimposing masking signals on the video signal on request.

Image reception system

An amplifier, for example, of a tape recording and reproducing apparatus, has a first smoothing power circuit for supplying DC power to operate the amplifying circuit when connected to an AC power source, and a second smoothing power circuit also adapted for connection to the AC power source for supplying DC power to operate other elements of the apparatus, such as, an oscillator for the bias signal to be applied to the recording head and/or an alarm for indicating the exhaustion of the tape, and also to energize a relay coil or the like by which change-over switches are actuated to their position for the recording mode of operation of the apparatus, with the first and second smoothing power circuits respectively having relatively large and small discharging time constants when disconnected from the AC power source so that, if the smoothing power circuits are disconnected from the AC power source while the apparatus is in its recording mode, the change-over switches may be returned to their positions for the reproducing or playback mode of the apparatus while the amplifying circuit is still operative to produce howling. Such howling is prevented by providing an amplifier, as aforesaid, with a holding circuit which detects the disconnection of the smoothing power circuits from the AC power source and, in response thereto, is effective to hold the change-over switches in their recording mode positions until the DC voltage applied to the amplifying circuit has declined sufficiently to render the latter inoperative.

Growing community of inventors

Kanagawa, Japan

Isamu Inagaki