US3996478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency divider for high frequencies
Assignee: US Philips Corp
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Filing: 1975-05-08
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Granted: 1976-12-07
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Expires: 1995-05-08
Abstract
Abstract A frequency divider for high frequencies including a first and a second bistable circuit, each of which include two cross-coupled transistors, in which the common emitter circuits of the transistors of the two bistable circuits are each connected through a current source to a point of constant potential. The collectors of the transistors of the first circuit are each connected to a respective collector of each of the transistors of the second bistable circuit, and a coupling resistor is included between the collector and the base of each of the auxiliary transistors.
Inventors
- 👤 Wolfdietrich Georg Kasperkovitz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 07:42
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/286; H03K3/288; H03K3/2885; H03B; H03B19/00; H03B19/06; H03B19/14; H03K23/00; H03K23/002
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
160 words
A frequency divider comprising a first and a second bistable circuit, each comprising two-cross-coupled transistors, first and second gating transistors connecting said cross-coupled transistors of said first and second bistable circuits respectively to a point of constant potential; the base of said first gating transistor being connected to a first signal input, and the base of said second gating transistor being connected to a second signal input inverted relative to said first signal input; said first bistable circuit including a pair of auxiliary transistors, connecting the collector of each of said transistors of said first bistable circuit by means of collector-base path to a respective collector of one of said transistors of said second bistable circuit, the emitters of said auxiliary transistors being connected to a point of constant potential; and a coupling resistor having a tap, connected between the collector and base of each of the auxiliary transistors, said tap being connected to the base of said auxiliary transistor.
Claim 2
Dependent Claim
160 words
A frequency divider comprising a first and a second bistable circuit, each comprising two-cross-coupled transistors, first and second gating transistors connecting said cross-coupled transistors of said first and second bistable circuits respectively to a point of constant potential; the base of said first gating transistor being connected to a first signal input, and the base of said second gating transistor being connected to a second signal input inverted relative to said first signal input; said first bistable circuit including a pair of auxiliary transistors, connecting the collector of each of said transistors of said first bistable circuit by means of collector-base path to a respective collector of one of said transistors of said second bistable circuit, the emitters of said auxiliary transistors being connected to a point of constant potential; and a coupling resistor having a tap, connected between the collector and base of each of the auxiliary transistors, said tap being connected to the base of said auxiliary transistor.
References Cited (Backward Citations)
US3681617A
Cited
US3728561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-12-07 | 1980-06-07 | 1980-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-07 | 1984-06-07 | 1984-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-07 | 1988-06-07 | 1988-12-07 | $7700.00 | Window Closed / Lapsed |