Patent EP0095750A2 successfully refreshed from Google Patents.
EP0095750A2
Expired / Lapsed
EP
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Battery saving circuit for a portable radio receiver
Assignee: NEC Corp
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Filing: 1983-05-27
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Granted: —
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Expires: 2003-05-27
Abstract
Abstract The battery saving circuit for a portable radio communication apparatus comprises a receiver section (2) for receiving a carrier wave which is modulated with a preamble and a subscriber identification signal (ID), a power supply (10) for supplying power to the receiver section (2) in response to a first control signal, and a decoder (4) responsive to the output of the receiver section (2) for detecting the received preamble and the received identification signal (ID) and selectively providing the first control signal to the power supply (10). The decoder (4) periodically begins the provision of the first control signal to the power supply (10), suspends the provision of the first control signal in response to a second control signal, continues said provision of said first control signal in response to a third control signal, immediately produces the second control signal in the absence of the preamble signal, and produces the third control signal for a first predetermined period of time in response to detection of the premable signal. This circuit improves the efficiency of battery saving (Fig. 2).
Inventors
- 👤 Yoshio Ichikawa
- 👤 Takashi Ohyagi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 17:59
CPC Classifications
H; H04; H04W; H04W52/00; H04W52/02; H04W52/0209; H04W52/0261; H04W52/0274; H04W52/028; H04W52/0283; H04B; H04B1/00; H04B1/06; H04B1/16; H04B1/1607; H04B1/1615; H04W88/00; H04W88/02; H04W88/022; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
170 words
A battery saving circuit for use in a portable radio communication apparatus, said circuit comprising receiver section means for receiving a carrier wave which is modulated with a preamble and a subscriber identification signal, power supply means for supplying power to said receiver section means in response to a first control signal, and decoder means responsive to the output of said receiver section means for detecting the received preamble and the received identification signal and selectively providing said first control signal to said power supply means, characterized in that said decoder means periodically begins the provision of said first control signal to said power supply means, suspends said provision of said first control signal in response to a second control signal, continues said provision of said first control signal in response to a third control signal, immediately produces said second control signal in the absence of said preamble signal, and produces said third control signal for a first predetermined period of time in response to detection of said preamble signal.
Claim 2
Dependent Claim
170 words
A battery saving circuit for use in a portable radio communication apparatus, said circuit comprising receiver section means for receiving a carrier wave which is modulated with a preamble and a subscriber identification signal, power supply means for supplying power to said receiver section means in response to a first control signal, and decoder means responsive to the output of said receiver section means for detecting the received preamble and the received identification signal and selectively providing said first control signal to said power supply means, characterized in that said decoder means periodically begins the provision of said first control signal to said power supply means, suspends said provision of said first control signal in response to a second control signal, continues said provision of said first control signal in response to a third control signal, immediately produces said second control signal in the absence of said preamble signal, and produces said third control signal for a first predetermined period of time in response to detection of said preamble signal.
Claim 3
Dependent Claim
51 words
A battery saving circuit, as claimed in claim 1, wherein said decoder means is further arranged to continue said provision of said first control for a second predetermined period of time after the lapse of said first period of time so that said decoder means can detect the received identification signal.
Claim 4
Dependent Claim
200 words
A battery saving circuit for use in a portable radio communication apparatus, said circuit comprising receiver section means for receiving a carrier wave which is modulated with a digital preamble and a digital identification code, power supply means for supplying power to said receiver section means in response to a first control signal, and decoder means responsive to the output of said receiver section means for respectively detecting a first coincidence between the received preamble code and a first predetermined code and a second coincidence between the received identification code and a second predetermined code, and selectively providing said first control signal to said power supply means, characterized in that said decoder means detects said first coincidence on bit-by-bit basis, periodecally begins the provision of said first control signal to said power supply means, suspends said provision of said first control signal in response to a second control signal, continues said provision of said first control signal in response to a third control signal, immediately produces said second control signal in response to no detection of said first coincidence, and produces said third control signal for a first predetermined period of time in response to detection of said first coincidence.
Claim 5
Dependent Claim
200 words
A battery saving circuit for use in a portable radio communication apparatus, said circuit comprising receiver section means for receiving a carrier wave which is modulated with a digital preamble and a digital identification code, power supply means for supplying power to said receiver section means in response to a first control signal, and decoder means responsive to the output of said receiver section means for respectively detecting a first coincidence between the received preamble code and a first predetermined code and a second coincidence between the received identification code and a second predetermined code, and selectively providing said first control signal to said power supply means, characterized in that said decoder means detects said first coincidence on bit-by-bit basis, periodecally begins the provision of said first control signal to said power supply means, suspends said provision of said first control signal in response to a second control signal, continues said provision of said first control signal in response to a third control signal, immediately produces said second control signal in response to no detection of said first coincidence, and produces said third control signal for a first predetermined period of time in response to detection of said first coincidence.
Claim 6
Dependent Claim
44 words
A battery saving circuit, as claimed in claim 3, wherein said decoder means is further arranged to continue said provision of said first control signal after the lapse of said first period of time so that said decoder means can detect said second coincidence.
Claim 7
Dependent Claim
168 words
A battery saving circuit, as claimed in claim 3, wherein said digital preamble code has a pattern of repetition of "1" and "0" and said decoder means has a microprocessor programmed to execute the steps of: (a) synchronizing the clock of said battery saving circuit with a digital output from said receiver section means; (b) determining, after the establishment of synchronization, whether or not said digital output is "I"; (c) starting a timer having a first timer period after waiting one bit if Step (b) gives a negative result or immediately if it is in the affirmative; (d) determining, after the start of said timer, whether or not said digital output is "0"; (e) determining, after Step (d), whether or not said digital output is "1"; (f) repeating the determinations of said Steps (d) and (e); and (g) suspending the provision of said first control signal to said power supply means when the number of negative responses to said Steps (d) to (f) have exceeded a predetermined number.
Claim 8
Dependent Claim
66 words
A battery saving circuit, as claimed in claim 5, wherein said microprocessor also has the step of continuing to supply said first control signal to said power supply means if the number of negative responses to said Steps (d) to (f) do not exceed said predetermined number and when said first timer period of the timer has elapsed, so that said second coincidence can be detected.
Claim 9
Independent Claim
86 words
A method for selectively supplying power to a receiver section of a portable communication apparatus, said receiver section receiving a carrier wave which is demodulated with a first and second signal, said method comprising: periodically beginning the supply of power to said receiver section; detecting the received first signal; stopping said supply of power if it is determined that said received first signal is not detected; and continuing said supply of power for a first predetermined period of time if said received first signal is detected.
Claim 10
Independent Claim
86 words
A method for selectively supplying power to a receiver section of a portable communication apparatus, said receiver section receiving a carrier wave which is demodulated with a first and second signal, said method comprising: periodically beginning the supply of power to said receiver section; detecting the received first signal; stopping said supply of power if it is determined that said received first signal is not detected; and continuing said supply of power for a first predetermined period of time if said received first signal is detected.
Claim 11
Dependent Claim
45 words
A method as claimed in claim 7 further comprising continuing said supply of power to said receiver section after the lapse of said first predetermined period of time for a second predetermined period of time so that said apparatus can detect the received second signal.
Claim 12
Independent Claim
110 words
A method for selectively supplying power to a receiver section of a digital communication apparatus, said receiver section receiving a carrier wave which is modulated with a digital preamble and a digital identification code, said method comprising: periodically beginning the supply of power to said receiver section; detecting a first coincidence between the received digital preamble and a first predetermined code on a bit-by-bit basis; stopping said supply of power if it is determined that the error number of the bit-by-bit basis detection exceeds a predetermined number; and continuing said supply of power for a first predetermined period of time if said error number is less than said predetermined number.
Claim 13
Independent Claim
110 words
A method for selectively supplying power to a receiver section of a digital communication apparatus, said receiver section receiving a carrier wave which is modulated with a digital preamble and a digital identification code, said method comprising: periodically beginning the supply of power to said receiver section; detecting a first coincidence between the received digital preamble and a first predetermined code on a bit-by-bit basis; stopping said supply of power if it is determined that the error number of the bit-by-bit basis detection exceeds a predetermined number; and continuing said supply of power for a first predetermined period of time if said error number is less than said predetermined number.
Claim 14
Dependent Claim
51 words
A method as claimed in claim 9 further comprising continuing said supply of power after the lapse of said first predetermined period of time for a second predetermined period of time so that said apparatus can detect a second coincidence between the received digital identification code and a second predetermined code.
References Cited (Backward Citations)
No citation records indexed.
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