Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – Having selection between plural continuous waveforms
Patent
1994-02-01
1996-01-16
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
Having selection between plural continuous waveforms
327117, 327491, 327563, 326126, H03K 19086, H03K 1762
Patent
active
054851106
ABSTRACT:
An ECL multiplexing circuit (20) includes two differential pairs (21 and 22) for receiving first and second ECL level input signals, emitter-follower output transistors (27 and 28), and a differential pair (31 and 32) for receiving differential clock signals. The differential clock signals control which of the two differential pairs (21 and 22) is coupled to the emitter-follower output transistors (27 and 28). The ECL level input signals that control a logic state of the output signals is determined by the logic state of the clock signals. The ECL multiplexing circuit (20) receives non-overlapping clock signals and is used in a quadrature frequency divide-by-two circuit (40) to divide a frequency of an input clock signal by two.
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Flannagan Stephen T.
Jones Kenneth W.
Callahan Timothy P.
Englund Terry L.
Hill Daniel D.
Motorola Inc.
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