Patent US4606076A successfully refreshed from Google Patents.
US4606076A
Expired / Lapsed
US
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Communication receiver system having a voltage converter with an operating frequency below the receiver IF
Assignee: NXP USA Inc
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Filing: 1985-01-07
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Granted: 1986-08-12
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Expires: 2005-01-07
Abstract
Abstract A communication receiver system for receiving coded signals and of the type having at least one predetermined intermediate frequency (IF) signal comprising a decoder for detecting and decoding the received coded signals and a DC/DC voltage converter circuit, connected to the decoder, for generating a voltage greater than the supply voltage of the communication receiver system at a frequency below the frequency of the IF signal. The system further comprises a frequency trim circuit, connected to the voltage converter circuit, for controlling the operating frequency of the DC/DC voltage converter circuit whereby interference with the IF signal is prevented.
Inventors
- 👤 Walter L. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:15
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1607
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
94 words
A communication receiver system for receiving coded signals and of the type having at least one predetermined intermediate frequency (IF) signal, comprising: decoder means for detecting and decoding received coded signals; voltage converter means, connected to said decoder means, for generating a voltage greater than a supply voltage of said communication receiver system, and operating at a frequency below the frequency of the IF signal; and frequency trim circuit means, connected to said voltage converter means, for controlling the operating frequency of said voltage converter means whereby interference with said IF signal is prevented.
Claim 2
Dependent Claim
94 words
A communication receiver system for receiving coded signals and of the type having at least one predetermined intermediate frequency (IF) signal, comprising: decoder means for detecting and decoding received coded signals; voltage converter means, connected to said decoder means, for generating a voltage greater than a supply voltage of said communication receiver system, and operating at a frequency below the frequency of the IF signal; and frequency trim circuit means, connected to said voltage converter means, for controlling the operating frequency of said voltage converter means whereby interference with said IF signal is prevented.
Claim 3
Dependent Claim
37 words
A communication receiver system, according to claim 1, wherein said frequency trim circuit means trims the operating frequency of said voltage converter means to a value that is subharmonically unrelated to the frequency of the IF signal.
Claim 4
Dependent Claim
43 words
A communication receiver system, according to claim 1, wherein said frequency trim circuit means trims the operating frequency of said voltage converter means whereby there are no harmonics that fall within a predetermined band of frequencies around the frequency of the IF signal.
Claim 5
Dependent Claim
18 words
A communications receiver system, according to claim 1, wherein said voltage converter means is a DC/DC voltage converter.
Claim 6
Dependent Claim
25 words
A communications receiver system, according to claim 1, wherein said frequency trim circuit means is programmable to either increase or decrease an output current thereof.
References Cited (Backward Citations)
US3501686A
Cited
US4355277A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-08-11 | 1990-02-10 | 1990-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-08-11 | 1994-02-10 | 1994-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-08-11 | 1998-02-10 | 1998-08-12 | $7700.00 | Window Closed / Lapsed |