Apparatus and method for minimizing the turn on time for a receiver operating in a discontinuous receive mode
First Claim
1. In a communication unit including a receiver coupled to receive a modulated signal and operative to produce a received signal having at least one parameter, the receiver having a discontinuous receive mode of operation wherein the receiver is permitted to be turned on and off, an apparatus for minimizing a turn on time for the receiver operating in the discontinuous receive mode, the apparatus comprising:
- receiver circuitry coupled to receive the received signal and a control signal and operative to produce an output data signal, having the at least one parameter, on a primary receive path; and
a controller coupled to receive the output data signal and operative to produce the control signal for;
adjusting the output data signal on the primary receive path by adjusting a value of the at least one parameter of the output data signal on the primary receive path, responsive to a value of the at least one parameter of the received signal, during the times when the receiver is turned on; and
holding the output data signal on the primary receive path by holding the value of the at least one parameter of the output data signal on the primary receive path, responsive to the value of the at least one parameter of the received signal, during the times when the receiver is turned off.
4 Assignments
0 Petitions
Accused Products
Abstract
In a communication unit a receiver (104) receives a modulated signal (118), and produces a received signal (120) having a parameter. The receiver (104) has a discontinuous receive mode of operation, wherein the receiver (104) is permitted to be turned on and off. Receiver circuitry (105) receives the received signal (120), and produces an output signal (124) having a parameter. A controller (110) adjusts a value of the parameter of the output signal (124), responsive to a value of the parameter of the received signal (120), during the times when the receiver (140) is turned on; and holds the value of the parameter of the output signal (124), responsive to the value of the parameter of the received signal (120), at the time when the receiver (104) is turned off. The present invention advantageously minimizes the turn on time for the receiver (104) operating in a discontinuous receive mode to save current drain.
37 Citations
19 Claims
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1. In a communication unit including a receiver coupled to receive a modulated signal and operative to produce a received signal having at least one parameter, the receiver having a discontinuous receive mode of operation wherein the receiver is permitted to be turned on and off, an apparatus for minimizing a turn on time for the receiver operating in the discontinuous receive mode, the apparatus comprising:
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receiver circuitry coupled to receive the received signal and a control signal and operative to produce an output data signal, having the at least one parameter, on a primary receive path; and a controller coupled to receive the output data signal and operative to produce the control signal for; adjusting the output data signal on the primary receive path by adjusting a value of the at least one parameter of the output data signal on the primary receive path, responsive to a value of the at least one parameter of the received signal, during the times when the receiver is turned on; and holding the output data signal on the primary receive path by holding the value of the at least one parameter of the output data signal on the primary receive path, responsive to the value of the at least one parameter of the received signal, during the times when the receiver is turned off. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. In a communication unit including a receiver coupled to receive a modulated signal and operative to produce a received signal having at least one parameter, the receiver having a discontinuous receive mode of operation wherein the receiver is permitted to be turned on and off, an apparatus for minimizing a turn on time for the receiver operating in the discontinuous receive mode, the apparatus comprising:
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an AC coupler comprising; a comparator coupled to receive the received signal and an analog integrated signal and operative to produce an AC coupled signal having a parameter; a digital integrator coupled to receive the AC coupled signal, a reference signal, and an adjust/hold control signal, and operative to produce a digital integrated signal; and an analog integrator coupled to receive the digital integrated signal and operative to produce the analog integrated signal; and a controller coupled to receive the AC coupled signal and operative to produce the adjust/hold signal for; adjusting a value of the at least one parameter of the AC coupled signal, responsive to a value of the at least one parameter of the received signal, during the times when the receiver is turned on; and holding the value of the at least one parameter of the AC coupled signal, responsive to the value of the at least one parameter of the received signal, during the times when the receiver is turned off. - View Dependent Claims (10)
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11. In a communication unit including a receiver coupled to receive a modulated signal and operative to produce a received signal having at least one parameter, the receiver having a discontinuous receive mode of operation wherein the receiver is permitted to be turned on and off, an apparatus for minimizing a turn on time for the receiver operating in the discontinuous receive mode, the apparatus comprising:
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a demodulator coupled to receive a reference signal, an AC coupled signal, and an adjust/hold control signal and operative to produce a data clock signal having the at least one parameter; and a controller coupled to receive the data clock signal and operative to produce the adjust/hold signal for; adjusting a value of the at least one parameter of the data clock signal, responsive to a value of the at least one parameter of the received signal, during the times when the receiver is turned on; and holding the value of the at least one parameter of the data clock signal, responsive to the value of the at least one parameter of the received signal, during the times when the receiver is turned off. - View Dependent Claims (12)
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13. A communication unit comprising:
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a receiver coupled to receive a modulated signal and operative to produce a received signal; an AC coupler coupled to receive the received signal, and operative to produce an AC coupled signal having at least one parameter, wherein; a value of the at least one parameter of the AC coupled signal is adjusted, responsive to a value of the at least one parameter of the received signal, during the times when the receiver is turned on; and the value of the at least one parameter of the AC coupled signal is held, responsive to the value of the at least one parameter of the received signal, at the time when the receiver is turned off; a data demodulator coupled to receive the AC coupled signal, and operative to produce a data clock signal having at least one parameter wherein; a value of the at least one parameter of the data dock signal is adjusted, responsive to a value of the at least one parameter of the received signal, during the times when the receiver is turned on; and the value of the at least one parameter of the data clock signal is held, responsive to the value of the at least one parameter of the received signal, at the time when the receiver is turned off; and a controller coupled to receive the data clock signal and operative to turn on and off the receiver, to adjust and hold the value of the at least one parameter of the AC coupled signal, and to adjust and hold the value of the at least one parameter of the data clock signal.
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14. In a communication unit including a receiver coupled to receive a modulated signal and operative to produce a received signal having at least one parameter, the receiver having a discontinuous receive mode of operation wherein the receiver is permitted to be turned on and off, the communication unit including receiver circuitry coupled to receive the received signal and operative to produce an output data signal, having the at least one parameter, on a primary receive path, a method for minimizing a turn on time for the receiver operating in the discontinuous receive mode, the method comprising the steps of:
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adjusting the output data signal on the primary receive path by adjusting a value of the at least one parameter of the output data signal on the primary receive path, responsive to a value of the at least one parameter of the received signal, during the times when the receiver is turned on; and holding the output data signal on the primary receive path by holding the value of the at least one parameter of the output data signal on the primary receive path, responsive to the value of the at least one parameter of the received signal, during the times when the receiver is turned off. - View Dependent Claims (15, 16, 17, 18, 19)
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Specification