Input circuit for portable electronic devices
AssigneeCitizen Watch Co., Ltd.
InventorsHeihachiro Ebihara, Fukuo Sekiya, Takashi Yamada
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Abstract
There is disclosed an input circuit for portable electronic devices comprising an exteriorly operable member for delivering an operating signal to a portable electronic device and including a first flip-flop set in synchronism with an edge of said operating signal, a second flip-flop for reading therein said operating signal and a reset signal preparing circuit supplied with an output from said second flip-flop and preparing a reset signal for said first flip-flop.
Claims10
An input circuit for portable electronic devices comprising:
- (a) an exteriorly operable member for delivering an operating signal to a portable electronic device as its input;
- (b) a first flip-flop activated for inverting the output thereof when a raising up edge of said operating signal is received;
- (c) a second flip-flop for receiving said operating signal in response to a periodic signal;
- (d) a reset signal preparing circuit supplied with an output delivered from said second flip-flop and preparing a reset signal for said first flip-flop;
- and
- (e) a toggle type flip-flop connected to an output terminal of said first flip-flop for generating a start/stop signal for controlling the portable electronic device.
An input circuit for portable electronic devices comprising a two terminal switch, a first flip-flop activated for inverting the output thereof when an operating signal is received from said two terminal switch, and a detection circuit including a second flip-flop for receiving said operating signal in response to a periodic signal for detecting a lowering down edge of said operating signal, said first flip-flop being reset by an output signal delivered from said detection circuit.
Dependencies are inferred from the claim text.