Circuit for simultaneously generating the sounds of both main pi

Details Circuit for simultaneously generating the sounds of both main pi Circuit for simultaneously generating the sounds of both main pi

1989-08-08

1992-03-24

Severin, David J.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Signal switching

358183, G11B 1512

Patent

active

050993658

ABSTRACT:
There is disclosed a circuit for simultaneously generating the sounds of both main picture and sub-picture for a PIP system by separately driving the main picture mode and the sub-picture mode. The invention to achieve the object has a first switching stage for selecting a given voltage, hi-fi sound stage for amplifying and demodulating the hi-fi regenerating signal, second switching stage for selecting a given voltage, linear sound receiving stage for receiving linear regenerating signals, third switching stage for selecting the output signal of the hi-fi sound receiving stage, adder for adding the output signal of the hi-fi sound receiving stage, first jack amplifier for amplifying the signal from the third switching stage to produce an output to headphone jack terminal, and second jack amplifier for amplifying the signal from the third switching stage to produce the output to headphone jack terminal.

REFERENCES:
patent: 2832821 (1958-04-01), DuMont
patent: 4486897 (1984-12-01), Nagai
patent: 4890168 (1989-12-01), Inoue et al.

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