Title: Device for forming a bipolar signal of 50% duty cycle

Abstract: The common return path of a circuit for applying pulses in alternating polarity to the balanced input transformer of a bipolar code signalling circuit is switched to block the first half and pass the last half of each pulse with a timing independent of polarity. The pulses supplied to the switched pulse-applying circuit have the same duration as the binary signal pulses from which they are derived, but these binary signal pulses are alternately supplied to the two sides of the pulse applying circuit by means of an AND-gate and a multivibrator. The same clock pulse generator times the multivibrator and the common path switching of the pulse-applying circuit. The circuit converts binary to bipolar signals free of asymmetric timing errors.

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Inventors: Aveneau, Andre A. (Clamart, FR)
DE Passoz, Guy A. (Lesigny, FR)

Application Number: 655681
Filing Date: 1976-02-06
Publication_date: 1977-07-05
Assignee: Societe Anonyme de Telecommunications (Paris, FR)
Primary Class(es): 327/171 327/175, 363/134
Other Classes:
US Patent Ref:

3172952	Mar, 1965	Lentz	307/262.
3188486	Jun, 1965	Favin	307/262.
3381088	Apr, 1968	Lentz et al.	307/261.

Other Refs:
Primary Examiner: Miller, Jr., Stanley D.
Assistant Examiner:
Attorney: Flynn & Frishauf