H - Electricity – 03 – K
Patent
H - Electricity
03
K
328/94
H03K 5/00 (2006.01) H03K 5/156 (2006.01) H03M 5/18 (2006.01)
Patent
CA 1109932
UNIPOLAR TO BIPOLAR CONVERTER ABSTRACT OF THE DISCLOSURE A unipolar to bipolar converter includes a source of unipolar data pulses and of noise pulses. Each data pulse has a pulse width in excess of a time duration t. Each noise pulse has a pulse width less than the time duration t. A one- shot multivibrator, with an input coupled to the source, normally provides a first output signal indicative of one binary state. The multivibrator switches to a second binary output state for the time duration t when the multivibrator receives the leading edge of one of the pulses (data or noise). A flip-flop, coupled to receive the output signals of the one-shot multi- vibrator, and further adapted to receive the source pulses, provide es a first output signal at one fixed binary state upon the simultaneous presence of one of the source pulses and the first output signal from the one-shot multivibrator. Otherwise, the flip-flop provides a second output signal at the opposite fixed binary state. A second one-shot multivibrator, coupled to receive the output signals from the first flip-flop, normally provides a first output signal indicative of one binary state. The second one-shot multivibrator switches to a second output signal indicative of the other binary state for a time duration t1 (which is not necessarily the same as the time duration t) when it receives the trailing edge of the first output signal from the first flip-flop. A second flip-flop coupled to receive the output signals from the second one-shot multivibrator, provides alternate output signals indicative of the two binary states. The second flip-flop switches state upon receipt of the trailing edge of the second one-shot multivibrator second output signal. The second flip-flop and the source pulses control means for providing an output signal which corresponds to the alternate switching of the polarity of the source pulses, de- pendent upon the state of the second flip-flop alternate output signals.
321932
Gte Laboratories Incorporated
R. William Wray & Associates
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