Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By pulse width or spacing
Patent
1995-06-02
1996-12-03
Wambach, Margaret Rose
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By pulse width or spacing
H03K 908
Patent
active
055812040
ABSTRACT:
A pulse width measurement circuit is provided, comprising (i) a comparator circuit for receiving a pulse, the time duration of which is to be measured, and for activating a pulse present signal in response to the received pulse; (ii) a counter for counting in response to the pulse present signal and for outputting a pulse count representing the duration of the received pulse; and (iii) a reset circuit for issuing a reset signal in response to a leading edge of the pulse present signal and for automatically resetting the counter to a base count in response to the leading edge of the pulse present signal. The comparator circuit is implemented in ECL circuitry and the counter is implemented in TTL circuitry. An ECL-to-TTL conversion circuit is disposed between the comparator circuit and the counter. The reset circuit includes a counter delay circuit for delaying the resetting of the counter for a predetermined time in response to the leading edge of the pulse present signal. A latch is clocked to store the contents of the counter in response to the trailing edge of the pulse present signal.
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International Business Machines - Corporation
Wambach Margaret Rose
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