US4910752A
Expired / Lapsed
US
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Low power digital receiver
Assignee: Motorola Solutions Inc
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Filing: 1988-02-29
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Granted: 1990-03-20
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Expires: 2008-02-29
Abstract
Abstract A low power digital receiver (10) is provided that contemporaneously selects the lowest possible sampling signal frequency (34) (from a plurality of available sampling signals), and received signal level (28) to properly digitize (32) and recover a desired signal. Digitization is performed after the first IF using broadband stages (28, 30, and 32) that are temporarily enabled (44) to rapidly digitize the first IF signal. This, together with the low sampling rate, minimizes the power consumption of the receiver (10) thereby permitting portable and mobile digital receiver embodiments.
Inventors
- 👤 Francis R. Yester, Jr.
- 👤 William J. Turney
- 👤 Paul H. Gailus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:26
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0261; H04W52/0287; H04W52/0293; H03; H03J; H03J5/00; H03J5/02; H03J5/0245; H03J5/0272; H03J5/0281; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1607; H04B1/1615; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
151 words
A method for recovering an information signal with a low power digital receiver, comprising the steps of: (a) bandlimiting a received signal to provide a bandlimited signal; (b) converting said bandlimited signal to provide an intermediate frequency signal; (c) filtering said intermediate frequency signal to provide a filtered signal; (d) generating at least two sampling signals; (e) selecting a particular one of said at least two sampling signals in response to a control signal; (f) sampling and digitizing said filtered signal using said selected one of said at least two sampling signals to provide a digitized signal; (g) processing said digitized signal to recover the information signal, and for generating said control signal in response to predetermined characteristics of said digitized signal such that the sampling rate is dynamically varied to properly recover the information signal while maintaining the lowest allowable sampling frequency thereby minimizing the power consumption of the receiver.
Claim 2
Independent Claim
151 words
A method for recovering an information signal with a low power digital receiver, comprising the steps of: (a) bandlimiting a received signal to provide a bandlimited signal; (b) converting said bandlimited signal to provide an intermediate frequency signal; (c) filtering said intermediate frequency signal to provide a filtered signal; (d) generating at least two sampling signals; (e) selecting a particular one of said at least two sampling signals in response to a control signal; (f) sampling and digitizing said filtered signal using said selected one of said at least two sampling signals to provide a digitized signal; (g) processing said digitized signal to recover the information signal, and for generating said control signal in response to predetermined characteristics of said digitized signal such that the sampling rate is dynamically varied to properly recover the information signal while maintaining the lowest allowable sampling frequency thereby minimizing the power consumption of the receiver.
Claim 3
Dependent Claim
153 words
A low power digital receiver for recovering an information signal, comprising: means for bandlimiting a received signal to provide a bandlimited signal; means for converting said bandlimited signal to provide an intermediate frequency signal; means for filtering said intermediate frequency signal to provide a filtered signal; means for generating at least two sampling signals; means for selecting a particular one of said at least two sampling signals in response to a control signal; means for sampling and digitizing said filtered signal using said selected one of said at least two sampling signals to provide a digitized signal; and means for processing said digitized signal to recover the information signal, and for generating said control signal in response to predetermined characteristics of said digitized signal such that the sampling rate is dynamically varied to properly recover the information signal while maintaining the lowest allowable sampling frequency thereby minimizing the power consumption of the receiver.
Claim 4
Dependent Claim
153 words
A low power digital receiver for recovering an information signal, comprising: means for bandlimiting a received signal to provide a bandlimited signal; means for converting said bandlimited signal to provide an intermediate frequency signal; means for filtering said intermediate frequency signal to provide a filtered signal; means for generating at least two sampling signals; means for selecting a particular one of said at least two sampling signals in response to a control signal; means for sampling and digitizing said filtered signal using said selected one of said at least two sampling signals to provide a digitized signal; and means for processing said digitized signal to recover the information signal, and for generating said control signal in response to predetermined characteristics of said digitized signal such that the sampling rate is dynamically varied to properly recover the information signal while maintaining the lowest allowable sampling frequency thereby minimizing the power consumption of the receiver.
Claim 5
Independent Claim
181 words
A method for recovering an information signal with a low power digital receiver, comprising the steps of: (a) bandlimiting a received signal to provide a bandlimited signal; (b) converting said bandlimited signal to provide an intermediate frequency signal; (c) filtering said intermediate frequency signal to provide a filtered signal; (d) generating at least two sampling signals; (e) selecting a particular one of said at least two sampling signals in response to a control signal; (f) sampling said filtered signal using said selected one of said at least two sampling signals to provide a sampled signal having a frequency approximately one-fourth that of said selected sampling signal; (g) digitizing said sampled using said selected one of said sampling signals to provide a digitized signal; (h) processing said digitized signal to recover the information signal, and for generating said control signal in response to predetermined characteristics of said sampled signal and said digitized signal such that the sampling rate is dynamically varied to properly recover the information signal while maintaining the lowest allowable sampling frequency thereby minimizing the power consumption of the receiver.
Claim 6
Independent Claim
181 words
A method for recovering an information signal with a low power digital receiver, comprising the steps of: (a) bandlimiting a received signal to provide a bandlimited signal; (b) converting said bandlimited signal to provide an intermediate frequency signal; (c) filtering said intermediate frequency signal to provide a filtered signal; (d) generating at least two sampling signals; (e) selecting a particular one of said at least two sampling signals in response to a control signal; (f) sampling said filtered signal using said selected one of said at least two sampling signals to provide a sampled signal having a frequency approximately one-fourth that of said selected sampling signal; (g) digitizing said sampled using said selected one of said sampling signals to provide a digitized signal; (h) processing said digitized signal to recover the information signal, and for generating said control signal in response to predetermined characteristics of said sampled signal and said digitized signal such that the sampling rate is dynamically varied to properly recover the information signal while maintaining the lowest allowable sampling frequency thereby minimizing the power consumption of the receiver.
References Cited (Backward Citations)
US3651413A
Cited
US4003002A
Cited
US3988539A
Cited
US3979701A
Cited
US4062060A
Cited
US4011438A
Cited
US4071821A
Cited
US4130806A
Cited
US4057759A
Cited
US4455680A
Cited
US4346477A
Cited
US4159526A
Cited
US4246653A
Cited
US4237554A
Cited
US4313211A
Cited
US4384361A
Cited
US4315219A
Cited
US4345500A
Cited
US4531237A
Cited
GB2081047A
Cited
US4356559A
Cited
US4419759A
Cited
US4384357A
Cited
US4506228A
Cited
US4475220A
Cited
US4479261A
Cited
US4590618A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-03-19 | 1993-09-18 | 1994-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-03-19 | 1997-09-18 | 1998-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-03-19 | 2001-09-18 | 2002-03-20 | $7700.00 | Window Closed / Lapsed |