US4695940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dynamic frequency divider with a mixer stage and an amplifier
Assignee: Telefunken Electronic GmbH
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Filing: 1986-03-04
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Granted: 1987-09-22
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Expires: 2006-03-04
Abstract
Abstract A dynamic frequency divider including a mixer stage and a transimpedance amplifier connected to the output of the mixer stage.
Inventors
- 👤 Hans-Martin Rein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:19
CPC Classifications
H; H03; H03F; H03F3/00; H03F3/45; H03F3/45071; H03F3/45076; H03F3/4508; H03F3/45085; H03F3/45089; H03B; H03B21/00; H03B21/01; H03B21/02; H03F2203/00; H03F2203/45; H03F2203/45311; H03F2203/45318; H03F2203/45652; H03F2203/45696; H03F2203/45702
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
79 words
A dynamic frequency divider for producing a signal having a frequency f from a signal having a frequency 2f, comprising: a mixer stage having first and second inputs and an output, said first input receiving a signal of frequency 2f; and a transimpedance amplifier having an input connected to the output of said mixer stage and an output connected to the second input of said mixer stage for feeding back to said mixer stage a signal of frequency f.
Claim 2
Dependent Claim
79 words
A dynamic frequency divider for producing a signal having a frequency f from a signal having a frequency 2f, comprising: a mixer stage having first and second inputs and an output, said first input receiving a signal of frequency 2f; and a transimpedance amplifier having an input connected to the output of said mixer stage and an output connected to the second input of said mixer stage for feeding back to said mixer stage a signal of frequency f.
Claim 3
Dependent Claim
43 words
A frequency divider according to claim 1, further including means, comprising one of emitter followers and Darlington stages connected to the output of said amplifier, for frequency response optimization, impedance conversion and level shift of the signal at the output of said amplifier.
Claim 4
Dependent Claim
30 words
A frequency divider according to claim 1, wherein said amplifier exhibits a small output impedance and a small input impedance and has a transfer function with a large band width.
Claim 5
Dependent Claim
25 words
A frequency divider according to claim 1, wherein said amplifier exhibits a rise in amplification at high frequencies with a subsequent steep drop in amplification.
Claim 6
Dependent Claim
27 words
A frequency divider according to claim 1, wherein said amplifier exhibits an output impedance with at least one of an inductive component and a negative real part.
Claim 7
Dependent Claim
31 words
A frequency divider according to claim 1, further including a load with at least one of a capacitive component and a negative real part connected at the output of said amplifier.
Claim 8
Dependent Claim
14 words
A frequency divider according to claim 1, wherein said amplifier is a differential amplifier.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-09-21 | 1991-03-23 | 1991-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-09-21 | 1995-03-23 | 1995-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-09-21 | 1999-03-23 | 1999-09-22 | $7700.00 | Window Closed / Lapsed |