Signal line changeover circuit with emitter followers

Details Signal line changeover circuit with emitter followers Signal line changeover circuit with emitter followers

1992-02-25

1995-05-02

Chin, Tommy

Facsimile and static presentation processing

Facsimile

Recording apparatus

358310, 358316, 358314, 348705, H04N 5782, H04N 5262

Patent

active

054124824

ABSTRACT:
A signal line changeover circuit includes a first signal processing block having a first emitter follower for outputting a signal, a second signal processing block having a second emitter follower for outputting a signal, and a switch block having a first terminal connected to an output terminal of the first emitter follower through a first signal line, a second terminal connected to an output terminal of the second emitter follower through a second signal line, a third terminal for outputting a signal, a selection switch for alternatively connecting the first and second terminals to the third terminal, a first switch connected between the first terminal and a power line and turned on when the selection switch selects the second terminal and a second switch connected between the second terminal and the power line and turned on when the selection switch selects the first terminal.

REFERENCES:
patent: 4782246 (1988-11-01), Kuroyanagi et al.
patent: 5038203 (1991-08-01), Hagino et al.

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