Communications: electrical – Continuously variable indicating – With meter reading
Patent
1987-10-02
1990-01-30
Yusko, Donald J.
Communications: electrical
Continuously variable indicating
With meter reading
340825800, 307468, H04Q 100
Patent
active
048976458
ABSTRACT:
In a crosspoint matrix, column lines are formed by two signal conductors connected to difference outputs of differential line drivers which are connected by switch element pairs of transistors to row lines, the row lines also each formed by two signal conductors. The two signal conductors of each row line are respectively connected to two outputs of a differential amplifier operating in a trigger mode. Each of the switch elements, includes a switching transistor having its control electrode charged with a through-connect or an inhibit signal and having its main electrode connected to an matrix output line and an auxiliary transistor forming a series circuit with the switching transistor. The auxiliary transistor has its control electrode connected to a matrix input line and its main electrode connected away from the series circuit connected to ground by a sampling transistor. The matrix output conductor is connected to an operating potential by way of a precharging transistor. Precharging and sampling transistors are oppositely driven with a switching matrix network selection clock which sub-divides a bit through-connect time interval into a precharging phase and an actual through-connect phase.
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Holloway III Edwin C.
Siemens Aktiengesellschaft
Yusko Donald J.
LandOfFree
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