US4994805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Delta sigma modulator arrangements compensated by chopper stabilization
Assignee: The General Electric Company PLC
•
Filing: 1989-08-03
•
Granted: 1991-02-19
•
Expires: 2009-08-03
Abstract
Abstract A delta sigma modulator arrangement in which non-ideal characteristics such as noise or offsets in amplifiers or other circuits of the circuits of the arrangement are compensated by chopper stabilisation.
Inventors
- 👤 Ian J. Dedic
- 👤 Alexander W. Vogt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:40
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/38; H03F3/387; H03M; H03M3/00; H03M3/30; H03M3/322; H03M3/324; H03M3/326; H03M3/338; H03M3/34; H03F2200/00; H03F2200/331; H03M3/39; H03M3/412; H03M3/422; H03M3/43; H03M3/436; H03M3/438; H03M3/454
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
114 words
A delta sigma modulator arrangement of the type including at least one component circuit in which noise or offset voltages may arise and which has a pair of input paths, a pair of input terminals, a pair of output terminals and a pair of output paths, said arrangement comprising: first changeover switch means operable periodically for connecting said pair of input paths at input connections to said pair of input terminals and for interchanging said input connections; and second changeover switch means operable periodically in step with said first changeover switch means for connecting said pair of output terminals at output connections to said pair of output paths and for interchanging said output connections.
Claim 2
Dependent Claim
114 words
A delta sigma modulator arrangement of the type including at least one component circuit in which noise or offset voltages may arise and which has a pair of input paths, a pair of input terminals, a pair of output terminals and a pair of output paths, said arrangement comprising: first changeover switch means operable periodically for connecting said pair of input paths at input connections to said pair of input terminals and for interchanging said input connections; and second changeover switch means operable periodically in step with said first changeover switch means for connecting said pair of output terminals at output connections to said pair of output paths and for interchanging said output connections.
Claim 3
Dependent Claim
27 words
A delta sigma modulator arrangement in accordance with claim 1, wherein said at least one component circuit comprises an integrator circuit having differential inputs and differential outputs.
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) | 1994-02-18 | 1994-08-20 | 1995-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-02-18 | 1998-08-20 | 1999-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-02-18 | 2002-08-20 | 2003-02-19 | $7700.00 | Window Closed / Lapsed |