Electrical pulse counters – pulse dividers – or shift registers: c – Systems – Particular input circuit
Patent
1993-03-08
1994-06-28
Callahan, Timothy P.
Electrical pulse counters, pulse dividers, or shift registers: c
Systems
Particular input circuit
377 54, 377 56, H03K 2102, H03K 2108
Patent
active
053254112
ABSTRACT:
A display driving circuit includes a latch circuit provided with a resetting terminal for receiving a pulse signal having a constant period and a setting terminal, a logic product circuit for receiving an output signal of the latch circuit and the pulse signal, a counting circuit having a resetting terminal for receiving an output signal of the logic product circuit and a counting terminal for receiving a clock signal, the counting circuit outputting a data pulse every time a number of pulses of the clock signals reaches a preset constant value from a reception of the output signal of the logic product circuit; and a shift register for receiving the data pulse of the counting circuit at a data signal input terminal thereof and receiving the clock signal at a clock input terminal thereof, the latch circuit being adapted to receive the data pulse of the counting circuit at said setting terminal thereof.
REFERENCES:
patent: 4380736 (1983-04-01), Pfaff
patent: 4777385 (1988-10-01), Hartmeier
Callahan Timothy P.
Riley Shawn
Sharp Kabushiki Kaisha
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