Power saving mode for receiver circuit blocks based on transmitter activity
First Claim
1. A wireless apparatus in a wireless full-duplex communication system, comprising:
- a voltage controlled oscillator (VCO) operable to generate an oscillator signal used for frequency downconversion of a signal received via a forward link, the VCO having an adjustable bias current; and
a processor operable to determine whether the wireless apparatus is transmitting on a reverse link and to adjust the bias current of the VCO based on whether the wireless apparatus is transmitting on the reverse link.
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Accused Products
Abstract
To reduce power consumption, receiver circuit blocks within a wireless device are biased with less current whenever possible while still achieving the desired performance. The receiver circuit blocks may include a voltage controlled oscillator (VCO) that generates an oscillator signal used for frequency downconversion of a received signal from the forward link, a low noise amplifier (LNA) that amplifies the received signal, and a mixer that frequency downconverts the received signal. The VCO may be biased with less current if phase noise performance is less stringent, e.g., when (1) the wireless device is not transmitting on the reverse link, (2) a large amplitude jammer is not detected, and/or (3) the received signal level is sufficiently high. The bias currents of other receiver circuit blocks may also be adjusted based on transmitter activity, detected jammer, and/or received signal level.
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Citations
30 Claims
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1. A wireless apparatus in a wireless full-duplex communication system, comprising:
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a voltage controlled oscillator (VCO) operable to generate an oscillator signal used for frequency downconversion of a signal received via a forward link, the VCO having an adjustable bias current; and
a processor operable to determine whether the wireless apparatus is transmitting on a reverse link and to adjust the bias current of the VCO based on whether the wireless apparatus is transmitting on the reverse link. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless apparatus in a wireless full-duplex communication system, comprising:
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means for determining whether the wireless apparatus is transmitting on a reverse link; and
means for adjusting bias current of a voltage controlled oscillator (VCO) based on whether the wireless apparatus is transmitting on the reverse link, wherein the VCO generates an oscillator signal used for frequency downconversion of a signal received via a forward link. - View Dependent Claims (9, 10, 11)
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12. A method of adjusting bias current in a wireless apparatus, comprising:
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determining whether the wireless apparatus is transmitting on a reverse link in a wireless full-duplex communication system; and
adjusting bias current of a voltage controlled oscillator (VCO) based on whether the wireless apparatus is transmitting on the reverse link, wherein the VCO generates an oscillator signal used for frequency downconversion of a signal received via a forward link.
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13. An integrated circuit comprising:
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a voltage controlled oscillator (VCO) operable to generate an oscillator signal used for frequency downconversion of a signal received via a forward link in a wireless full-duplex communication system; and
a first variable current source operative to provide an adjustable bias current for the VCO, the bias current of the VCO being adjusted based on at least one condition including whether a signal is being transmitted on a reverse link. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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22. A wireless apparatus in a wireless full-duplex communication system, comprising:
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a processor operable to determine at least one condition indicative of an operating environment for the wireless apparatus, the at least one condition including whether the wireless apparatus is transmitting on a reverse link; and
at least one receiver circuit block operable to process a signal received via a forward link, wherein each of the at least one receiver circuit block has an adjustable bias current that is set based on the at least one condition. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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Specification