Transparent latch-based sequencer and sequence controlling metho

Details Transparent latch-based sequencer and sequence controlling metho Transparent latch-based sequencer and sequence controlling metho

1998-05-06

2000-02-01

Tran, Toan

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Frequency or repetition rate conversion or control

327115, H03B 1900

Patent

active

060207701

ABSTRACT:
A sequence-controlled digital circuit (21) is presented. The circuit (21) includes a divider (55) and a plurality of transparent latches (51-54) which together form a latch-based sequencer (42). Typically, a clock signal (43) is divided by the divider (55) into an inverted half-clock signal (45) and a non-inverted half-clock signal (44), each enabling alternate latches (51-54) arranged in a cascade. In the cascade, an output of each latch (51-54) drives an input of the following latch (51-54), one such being an inverting output and the rest non-inverting outputs, to form a twisted-loop counter (50). Each output of each latch (51-54) drives a clock input of a flip-flop (61-68), with a serial input signal (46) driving all data inputs, to form a temporal-to-spacial converter (40). Only the divider (55) operates at the rate of the clock signal (43).

REFERENCES:
patent: 3851258 (1974-11-01), Freedman
patent: 4678281 (1987-07-01), Bauer
patent: 4901076 (1990-02-01), Askin et al.
patent: 5223833 (1993-06-01), Akata
patent: 5341031 (1994-08-01), Kinoshita et al.

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