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7D14: Difference between revisions
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A differential FET buffer + bipolar amplifier stage drives a counter gate that uses a 10 mA [[tunnel diode]] as the switching element. | A differential FET buffer + bipolar amplifier stage drives a counter gate that uses a 10 mA [[tunnel diode]] as the switching element. | ||
The first decade is implemented as a divide-by-2 ECL flip-flop followed by a 5-stage ring counter made with discrete transistor pairs (note circular layout) and some logic to BCD-encode the count result. | The first decade is implemented as a divide-by-2 ECL flip-flop ([[156-0377-00]]) followed by a 5-stage ring counter made with discrete transistor pairs (note circular layout) and some logic to BCD-encode the count result. | ||
The following seven counter stages are conventional TTL decade ripple counters (N8292A). | The following seven counter stages are conventional TTL decade ripple counters (N8292A). | ||