Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1986-02-25
1987-08-11
Miller, Stanley D.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307443, 307454, 307272A, 307291, H03K 19086
Patent
active
046863940
ABSTRACT:
A two-level series gating complementary output master-slave D-type flip-flop (100) with multiplexed input incorporates a novel current-splitting network (108). The flip-flop includes a master latch (102), a slave latch (104) and a 2:1 multiplexer (106) incorporated into the master latch. The multiplexer includes a pair of matched, emitter-coupled, collector-uncoupled transistors (Q12 and Q13), the bases of which are tied to a reference voltage (VBB2). When a clock pulse (CP) is low, substantial network current flows through both matched transistors. This arrangement allows the circuit function to be implemented with a reduced transistor count and only two current sources. The master latch output (QM) is determined by the voltage at the base of an output transistor (Q21), which voltage is determined by the presence or absence of a current through a load resistor (RL1). When the clock (CP) is high, the master latch output (QM) is fed back through control of a feedback transistor (Q23) and transferred to the slave latch through control of an input transistor (Q29). The currents through load resistors (RL2 and RL3) in the slave latch control the complementary outputs (QS) and (QS*) by setting the voltages at the bases of two output transistors (Q33 and Q35).
REFERENCES:
patent: 3446989 (1969-05-01), Allen et al.
patent: 3649844 (1972-03-01), Kroos
patent: 3760190 (1973-09-01), Hannaford
patent: 3917961 (1975-11-01), Reed
patent: 4215418 (1980-07-01), Muramatsu
patent: 4359647 (1982-11-01), Trinkl
patent: 4580066 (1986-04-01), Berndt
Anderson Clifton L.
Fairchild Semiconductor
Hudspeth D. R.
Miller Stanley D.
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