US3590285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage controlled phase shift network
Assignee: Bendix Corp
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Filing: 1969-03-06
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Granted: 1971-06-29
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Expires: 1989-03-06
Abstract
Abstract A circuit for selectively reversing an input signal by 180* is described. The input signal, which can be a pulse train or a continuously varying signal is applied to an input terminal. A control voltage is applied to a control terminal. When the control voltage is zero the input signal is amplified but does not undergo a phase shift. When a positive voltage is applied to the control terminal the input signal is amplified and also undergoes a 180* phase shift. The phase of the output signal can therefore be varied by switching the control voltage on and off.
Inventors
- 👤 Atwood H Hargrove
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 16:52
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/16; H03H11/18; H03F; H03F3/00; H03F3/72
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
160 words
A voltage controlled phase shift network comprising: a first transistor having a first base electrode, first emitter electrode and first collector electrode; an output terminal; a second transistor having a second base electrode, second emitter electrode and second collector electrode, said first and second collector electrodes being connected in common to said output terminal; a DC voltage source having first and second terminals; first means for connecting said first base electrode to said first terminal; second means for connecting said second emitter electrode to said second terminal; third means for connecting said first emitter electrode with said second base electrode; an input terminal; means for connecting said input terminal to said first base electrode; means for connecting said input terminal to said second emitter electrode; means for directly shunting said second base electrode to said second terminal when energized; means for selectively energizing said shunting means; and, a common load connected between said first terminal and said common collector electrodes.
Claim 2
Dependent Claim
160 words
A voltage controlled phase shift network comprising: a first transistor having a first base electrode, first emitter electrode and first collector electrode; an output terminal; a second transistor having a second base electrode, second emitter electrode and second collector electrode, said first and second collector electrodes being connected in common to said output terminal; a DC voltage source having first and second terminals; first means for connecting said first base electrode to said first terminal; second means for connecting said second emitter electrode to said second terminal; third means for connecting said first emitter electrode with said second base electrode; an input terminal; means for connecting said input terminal to said first base electrode; means for connecting said input terminal to said second emitter electrode; means for directly shunting said second base electrode to said second terminal when energized; means for selectively energizing said shunting means; and, a common load connected between said first terminal and said common collector electrodes.
Claim 3
Dependent Claim
39 words
The phase shift network of claim 1 wherein said shunting means is a third transistor having an emitter-collector circuit connected between said second base electrode and said second terminal, and a base electrode connected to said selectively energizing means.
Claim 4
Dependent Claim
21 words
The phase shift network of claim 2 wherein said first, second and third means are first, second and third resistors respectively.
Claim 5
Dependent Claim
13 words
The phase shift network of claim 3 wherein said third resistor is variable.
Claim 6
Dependent Claim
39 words
The phase shift network of claim 1 wherein said shunting means is a third transistor having an emitter-collector circuit connected between said second base electrode and said second terminal, and a base electrode connected to said selectively energizing means.
Claim 7
Dependent Claim
21 words
The phase shift network of claim 2 wherein said first, second and third means are first, second and third resistors respectively.
Claim 8
Dependent Claim
13 words
The phase shift network of claim 3 wherein said third resistor is variable.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-06-28 | 1974-12-28 | 1975-06-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-28 | 1978-12-28 | 1979-06-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-28 | 1982-12-28 | 1983-06-29 | $7700.00 | Window Closed / Lapsed |