Patent US5298809A successfully refreshed from Google Patents.
US5298809A
Expired / Lapsed
US
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Balanced type differential integrating circuit
Assignee: Sharp Corp
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Filing: 1992-03-23
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Granted: 1994-03-29
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Expires: 2012-03-23
Abstract
Abstract A balanced type differential amplifier circuit including a mutual-conductance differential amplifier circuit having two differential output terminals, a constant-current circuit for supplying an operating current to the mutual-conductance differential amplifier circuit, two resistors connected in series across the two differential output terminals in order to detect an in-phase component of output voltages of the two differential output terminals, and a circuit for adjusting a value of the operating current supplied by the constant-current circuit according to the value of the detected in-phase component.
Inventors
- 👤 Hiroshi Yamaguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 23:24
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/45; H03F3/45071; H03F3/45479; H03F2203/00; H03F2203/45; H03F2203/45008; H03F2203/45051; H03F2203/45074; H03F2203/45178; H03F2203/45188; H03F2203/45201; H03F2203/45212; H03F2203/45221; H03F2203/45274; H03F2203/45471; H03F2203/45641
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
105 words
A differential integrating circuit comprising: a mutual-conductance differential amplifier circuit having two differential output terminals; first and second capacitors, respectively coupled to outputs of said mutual-conductance differential amplifier circuit, for converting the outputs into integral outputs; first and second buffers, respectively coupled to said first and second capacitors, for converting said integral outputs into respective voltage signals; a constant-current circuit for supplying an operating current to said mutual-conductance differential amplifier circuit; means for detecting an in-phase component of said voltage signals; and means for adjusting a value of the operating current supplied by said constant-current circuit according to a value of the in-phase component detected.
Claim 2
Dependent Claim
105 words
A differential integrating circuit comprising: a mutual-conductance differential amplifier circuit having two differential output terminals; first and second capacitors, respectively coupled to outputs of said mutual-conductance differential amplifier circuit, for converting the outputs into integral outputs; first and second buffers, respectively coupled to said first and second capacitors, for converting said integral outputs into respective voltage signals; a constant-current circuit for supplying an operating current to said mutual-conductance differential amplifier circuit; means for detecting an in-phase component of said voltage signals; and means for adjusting a value of the operating current supplied by said constant-current circuit according to a value of the in-phase component detected.
Claim 3
Dependent Claim
31 words
The differential integrating circuit according to claim 1, wherein said means for detecting the in-phase component comprises first and second resistors respectively connected in series with said first and second buffers.
Claim 4
Dependent Claim
37 words
The differential integrating circuit according to claim 2, wherein a voltage of a node of said first and second resistors is supplied as the in-phase component to said means for adjusting the value of the operating current.
Claim 5
Dependent Claim
19 words
The differential integrating circuit according to claim 1, wherein said two differential output terminals are differential current output terminals.
Claim 6
Dependent Claim
38 words
The differential integrating circuit according to claim 1, wherein said mutual-conductance differential amplifier circuit comprises: a current-multiplier circuit for inputting input signals to the differential integrating circuit and for outputting the outputs of said mutual-conductance difference amplifier circuit.
Claim 7
Dependent Claim
38 words
The differential integrating circuit according to claim 5, wherein said current-multiplier circuit comprises: a constant-voltage circuit for supplying an operating voltage of said current-multiplier circuit; and a constant-current circuit for supplying an operating current of said current-multiplier circuit.
References Cited (Backward Citations)
US3786362A
Cited
JPS56168410A
Cited
US4616189A
Cited
US4701719A
Cited
US4752744A
Cited
US4742308A
Cited
US4901030A
Cited
US4835488A
Cited
US5180932A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-03-28 | 1997-09-27 | 1998-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-03-28 | 2001-09-27 | 2002-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-03-28 | 2005-09-27 | 2006-03-29 | $7700.00 | Window Closed / Lapsed |