US3609755A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Unipolar to bipolar code converter
Assignee: AG Communication Systems Corp
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Filing: 1969-05-12
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Granted: 1971-09-28
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Expires: 1989-05-12
Abstract
Abstract A circuit arrangement adapted to effect conversion of unipolar code pulses into corresponding pulses having an alternating bipolar form (pseudoternary code pulses). By employing the reflection occurring in a line matched to the conversion circuit and short circuited at the distant terminal, the usual two separate channel double regeneration technique is avoided.
Inventors
- 👤 Alessandro Fenyves
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 01:17
CPC Classifications
H; H04; H04L; H04L25/00; H04L25/02; H04L25/20; H04L25/22; H03; H03M; H03M5/00; H03M5/02; H03M5/16; H03M5/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
175 words
A circuit for converting unipolar code pulses into corresponding bipolar code pulses, comprising: an amplifier including an input for connection to a unipolar pulse source; a bistable flip-flop including an input connected to said amplifier, operated in response to amplified unipolar code pulses to produce a corresponding train of bilevel pulses; a slicing circuit connected to the output of said flip-flop, operated to shape said bilevel pulses received from said flip-flop; a delay line of predetermined length connected at the near end to the output of said slicing circuit and short circuited at the distant end; whereby shaped bilevel pulses from said slicing circuit are conducted to said line; and output circuit means also connected to the output of said slicing circuit and to the near End of said line; said bilevel pulses being reflected with reversed polarity and a predetermined time delay by said line; said pulses conducted to said line and said reflected pulses resulting in signals at said output circuit corresponding to said unipolar input pulses, in bipolar alternating code signal form.
Claim 2
Dependent Claim
175 words
A circuit for converting unipolar code pulses into corresponding bipolar code pulses, comprising: an amplifier including an input for connection to a unipolar pulse source; a bistable flip-flop including an input connected to said amplifier, operated in response to amplified unipolar code pulses to produce a corresponding train of bilevel pulses; a slicing circuit connected to the output of said flip-flop, operated to shape said bilevel pulses received from said flip-flop; a delay line of predetermined length connected at the near end to the output of said slicing circuit and short circuited at the distant end; whereby shaped bilevel pulses from said slicing circuit are conducted to said line; and output circuit means also connected to the output of said slicing circuit and to the near End of said line; said bilevel pulses being reflected with reversed polarity and a predetermined time delay by said line; said pulses conducted to said line and said reflected pulses resulting in signals at said output circuit corresponding to said unipolar input pulses, in bipolar alternating code signal form.
Claim 3
Dependent Claim
23 words
A converter circuit as claimed in claim 1 wherein: said shaping circuit output impedance is matched to the characteristic impedance of said line.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |