Coupling device of external signal with television receiver

Abstract

Abstract PURPOSE:To improve operability by controlling a channel selecting voltage generating circuit with n-number of outputs from an (n+1)-notation counter and controlling a changeover switch with another output. CONSTITUTION:In case of reception of a TV signal, one of changeover switches 11-22 is selected to obtain an output only in the prescribed output terminal of a counter 43 related to the selected changeover switch. Consequently, a channel selecting voltage is generated only from a variable resistance, which is connected to said prescribed output terminal, out of n-number of variable resistances 24-35 connected to the output side of the counter 43, and this channel selecting voltage is sent to an electronic tuning tuner 37. The existence of the (n+1)th input is stored in the counter 43 by the operation of a changeover switch 23 to output ''1'' alternatively, and a changeover switch 38 is switched by this output to reproduce the video output of a VTR1 onto a CRT9 as a picture. Pulses having a prescribed period are supplied to the counter 43 by the operation of a remote control device 44, and output ''1'' is supplied to succeeding channels successively.

Inventors

• 👤 Masayuki Motomiya
• 👤 本宮　正之
• 👤 Yoshio Ishigaki
• 👤 石垣　良夫
• 👤 Hisao Okada
• 👤 久男 岡田

Bibliographic Details