US4052679A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase shifting circuit
Assignee: Sanyo Electric Co Ltd
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Filing: 1976-04-14
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Granted: 1977-10-04
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Expires: 1996-04-14
Abstract
Abstract The present disclosure relates to a phase shifting circuit for shifting the phase of an alternating circuit, which comprises a series-connected circuit of a resistor, and a capacitor for passing the alternating signal therethrough, a pair of differential amplification circuits each connected with the resistor and the capacitor, and a transistor for combining two alternating signals obtained from the pair of differential amplification circuits each controlled by a constant current source, whereby the combined alternating signal obtained from the transistor is shifted for some degrees.
Inventors
- 👤 Nobukazu Hosoya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:29
CPC Classifications
H; H04; H04N; H04N9/00; H04N9/44; H04N9/455; H03; H03H; H03H11/00; H03H11/02; H03H11/16; H03H11/20
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
250 words
A phase shifting circuit for shifting the phase of an alternating signal applied to thereto said phase shifting circuit comprising: a. a phase shifting means having two electrical elements connected in series, the phase characteristics of a first of the electrical elements being different from that of the second electrical element and wherein one of the electrical elements is a capacitive element, whereby the phase of said alternating voltage signal across the first electrical element is different from that across the second electrical element; and wherein input signals of opposite polarity are applied to each end of said serially connected electrical elements. b. a first differential circuit including first and second transistors interconnected at a first common terminal, and having first and second input terminals connected with said first electrical element for amplifying a first signal which is obtained from the voltage drop across said first electrical element; c. a second differential circuit including third and fourth transistors interconnected at a second common terminal, and having third and fourth input terminals connected with said second electrical element for amplifying a second signal which is obtained from the voltage drop across said second electrical element; d. means for combining said first signal from said first differential circuit with second signal from said second differential circuit; e. a constant current source means connected to each of said first common terminal and second common terminal, and connected to reference voltage point; and f. means for controlling a conductivity of said constant current source.
Claim 2
Dependent Claim
250 words
A phase shifting circuit for shifting the phase of an alternating signal applied to thereto said phase shifting circuit comprising: a. a phase shifting means having two electrical elements connected in series, the phase characteristics of a first of the electrical elements being different from that of the second electrical element and wherein one of the electrical elements is a capacitive element, whereby the phase of said alternating voltage signal across the first electrical element is different from that across the second electrical element; and wherein input signals of opposite polarity are applied to each end of said serially connected electrical elements. b. a first differential circuit including first and second transistors interconnected at a first common terminal, and having first and second input terminals connected with said first electrical element for amplifying a first signal which is obtained from the voltage drop across said first electrical element; c. a second differential circuit including third and fourth transistors interconnected at a second common terminal, and having third and fourth input terminals connected with said second electrical element for amplifying a second signal which is obtained from the voltage drop across said second electrical element; d. means for combining said first signal from said first differential circuit with second signal from said second differential circuit; e. a constant current source means connected to each of said first common terminal and second common terminal, and connected to reference voltage point; and f. means for controlling a conductivity of said constant current source.
Claim 3
Dependent Claim
22 words
A phase shifting circuit as claimed in claim 1, wherein the other of said first and second electrical elements is a resistor.
Claim 4
Dependent Claim
29 words
A phase shifting circuit as claimed in claim 1, wherein said first electrical element is resistor and said second electrical element is resistor and capacitor being connected in parallel.
Claim 5
Dependent Claim
20 words
A phase shifting circuit as claimed in claim 1, wherein said phase shifting circuit is formed in an integrated circuit.
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) | 1980-10-03 | 1981-04-04 | 1981-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-03 | 1985-04-04 | 1985-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-03 | 1989-04-04 | 1989-10-04 | $7700.00 | Window Closed / Lapsed |