US5355518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Receiver with constant battery saving duty cycle
Assignee: Motorola Solutions Inc
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Filing: 1992-05-26
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Granted: 1994-10-11
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Expires: 2012-05-26
Abstract
Abstract A receiver (100) for receiving a carrier signal to produce a recovered signal provides increased battery savings. The receiver (100) includes a detector (10) for detecting the absence of the carrier signal and a detector for detecting the presence of a valid coded squelch signal (87). The receiver (100)is placed in a first battery saver mode (41) having a duty cycle of a first ON time period and a first OFF time period, in response to the detected absence of the carrier signal. On the other hand, if the presence of the carrier signal is detected, without the presence of a valid coded squelch signal, the receiver (100) is placed in a second battery saver mode (42). The second battery saver mode has the same duty cycle as the first battery saver mode, but the second battery saver mode has longer ON and OFF time periods than the first time periods.
Inventors
- 👤 Peter A. Kindinger
- 👤 James C. Knutsen
- 👤 Kevin J. Kuehr
- 👤 James E. Eppley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:13
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0225; H04W52/0238; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
281 words
A method for saving battery energy in a radio, having a receiver for receiving a carrier signal to produce a recovered signal, the method comprising the steps off placing said radio in a first battery saver mode having a duty cycle determined by a first ON time period and a first OFF time period; detecting the absence of the carrier signal during said first ON time period; maintaining said radio in said first battery saver mode in response to the detecting of the absence of the carrier signal, said first battery saver mode having said first OFF time period for allowing said radio to sleep; detecting the presence of the carrier signal during said first ON time period; placing said radio, in a second battery saver mode, in response to the detected presence of the carrier signal, the second battery saver mode having the same duty cycle as the first battery saver mode, but the second battery saver mode having a second ON time period and a second OFF time period, both second periods being longer than said first time periods; detecting the presence of a non-valid coded squelch signal in said recovered signal during said second ON time period; and maintaining said radio, in said second battery saver mode, in response to the detected presence of the carrier signal and the detected presence of the non-valid coded squelch signal, the second battery saver mode having said second OFF time period, said second OFF time period extended longer from said first OFF time period for allowing said radio to sleep longer to maintain the same battery savings from said first battery saver mode, even with said longer second ON time period.
Claim 2
Independent Claim
281 words
A method for saving battery energy in a radio, having a receiver for receiving a carrier signal to produce a recovered signal, the method comprising the steps off placing said radio in a first battery saver mode having a duty cycle determined by a first ON time period and a first OFF time period; detecting the absence of the carrier signal during said first ON time period; maintaining said radio in said first battery saver mode in response to the detecting of the absence of the carrier signal, said first battery saver mode having said first OFF time period for allowing said radio to sleep; detecting the presence of the carrier signal during said first ON time period; placing said radio, in a second battery saver mode, in response to the detected presence of the carrier signal, the second battery saver mode having the same duty cycle as the first battery saver mode, but the second battery saver mode having a second ON time period and a second OFF time period, both second periods being longer than said first time periods; detecting the presence of a non-valid coded squelch signal in said recovered signal during said second ON time period; and maintaining said radio, in said second battery saver mode, in response to the detected presence of the carrier signal and the detected presence of the non-valid coded squelch signal, the second battery saver mode having said second OFF time period, said second OFF time period extended longer from said first OFF time period for allowing said radio to sleep longer to maintain the same battery savings from said first battery saver mode, even with said longer second ON time period.
Claim 3
Dependent Claim
62 words
The method according to claim 1, further comprising the steps of: periodically waking up and detecting whether a valid coded squelch signal is present in said recovered signal during said second ON time period; and returning to the second battery saver mode, in response to the detected absence of the valid coded squelch signal and the detected presence of the carrier signal.
Claim 4
Independent Claim
226 words
A method for saving battery energy in a radio, having a receiver for receiving a carrier signal to produce a recovered signal, the method comprising the steps of: determining a duty cycle selected for said radio, wherein said duty cycle is determined by a first ON time period and a first OFF time period; placing said radio in a first battery saver mode having said duty cycle; detecting the absence of the carrier signal during the first ON time period; maintaining said radio in said first battery saver mode in response to the detecting of the absence of the carrier signal; detecting the presence of the carrier signal during said first ON time period; placing said radio, in a second battery saver mode, in response to the detected presence of the carrier signal, the second battery saver mode having the same duty cycle as the first battery saver mode, but the second battery saver mode having a second ON time period and a second OFF time period, both second periods being longer than said first time periods; detecting the presence of a non-valid coded squelch signal in said recovered signal during said second ON time period; and maintaining said radio, in said second battery saver mode, in response to the detected presence of the carrier signal and the detected presence of the non-valid coded squelch signal.
Claim 5
Independent Claim
226 words
A method for saving battery energy in a radio, having a receiver for receiving a carrier signal to produce a recovered signal, the method comprising the steps of: determining a duty cycle selected for said radio, wherein said duty cycle is determined by a first ON time period and a first OFF time period; placing said radio in a first battery saver mode having said duty cycle; detecting the absence of the carrier signal during the first ON time period; maintaining said radio in said first battery saver mode in response to the detecting of the absence of the carrier signal; detecting the presence of the carrier signal during said first ON time period; placing said radio, in a second battery saver mode, in response to the detected presence of the carrier signal, the second battery saver mode having the same duty cycle as the first battery saver mode, but the second battery saver mode having a second ON time period and a second OFF time period, both second periods being longer than said first time periods; detecting the presence of a non-valid coded squelch signal in said recovered signal during said second ON time period; and maintaining said radio, in said second battery saver mode, in response to the detected presence of the carrier signal and the detected presence of the non-valid coded squelch signal.
Claim 6
Dependent Claim
217 words
A receiver comprising: means for placing said receiver in a first battery saver mode having a duty cycle determined by a first ON time period and a first OFF time period; means for receiving a carrier signal to produce a recovered signal; means for detecting the absence of the carrier signal during said first ON time period; means for maintaining said receiver in said first battery saver mode in response to the detected absence of the carrier signal; means for detecting the presence of the carrier signal during said first ON time period; means for switching said radio, from said first battery saver mode to a second battery saver mode, in response to the detected presence of the carrier signal, the second battery saver mode having the same duty cycle as the first battery saver mode, but the second battery saver mode having a second ON time period and a second OFF time period, both second periods being longer than said first time periods; means for detecting the presence of a non-valid coded squelch signal in said recovered signal during said second ON time period; and means for maintaining said receiver, in said second battery saver mode, in response to the detected presence of the carrier signal and the detected presence of said non-valid coded squelch signal.
Claim 7
Dependent Claim
217 words
A receiver comprising: means for placing said receiver in a first battery saver mode having a duty cycle determined by a first ON time period and a first OFF time period; means for receiving a carrier signal to produce a recovered signal; means for detecting the absence of the carrier signal during said first ON time period; means for maintaining said receiver in said first battery saver mode in response to the detected absence of the carrier signal; means for detecting the presence of the carrier signal during said first ON time period; means for switching said radio, from said first battery saver mode to a second battery saver mode, in response to the detected presence of the carrier signal, the second battery saver mode having the same duty cycle as the first battery saver mode, but the second battery saver mode having a second ON time period and a second OFF time period, both second periods being longer than said first time periods; means for detecting the presence of a non-valid coded squelch signal in said recovered signal during said second ON time period; and means for maintaining said receiver, in said second battery saver mode, in response to the detected presence of the carrier signal and the detected presence of said non-valid coded squelch signal.
Claim 8
Dependent Claim
20 words
The receiver of claim 4 further including means for defining either of said battery saver modes on a channel-by-channel basis.
Claim 9
Dependent Claim
20 words
The receiver of claim 4 further including means for disabling either of said battery saver modes on a channel-by-channel basis.
Claim 10
Dependent Claim
24 words
The receiver of claim 4 further including means for varying said duty cycle of either of said battery saver modes on a channel-by-channel basis.
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) | 1997-10-10 | 1998-04-11 | 1998-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-10-10 | 2002-04-11 | 2002-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-10-10 | 2006-04-11 | 2006-10-11 | $7700.00 | Window Closed / Lapsed |