Methods and apparatus for suppression of low-frequency noise and drift in wireless sensors or receivers
First Claim
Patent Images
1. An imaging receiver, comprising:
- a low noise amplifier (LNA) module to receive and amplify e radio-frequency (RF) input signal;
one or more switches configured to selectively pass RF input to one or more of the power detector circuits;
one or more power detector circuits coupled to the switches to generate output voltages proportional to associated powers at their input ports;
one or more reference circuits to provide reference signals to the switches; and
one or more integrator circuits to integrate the output voltages of the power detector circuits.
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Abstract
An imaging receiver includes a low noise amplifier (LNA) module to receive and amplify the radio-frequency (RF) input signal; one or more switches configured to selectively pass RF input to one or more of the power detector circuits; one or more power detector circuits coupled to the switches to generate output voltages proportional to associated powers at their input ports; one or more reference circuits to provide reference signals to the switches; and one or more integrator circuits to integrate the output voltages of the power detector circuits.
53 Citations
25 Claims
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1. An imaging receiver, comprising:
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a low noise amplifier (LNA) module to receive and amplify e radio-frequency (RF) input signal; one or more switches configured to selectively pass RF input to one or more of the power detector circuits; one or more power detector circuits coupled to the switches to generate output voltages proportional to associated powers at their input ports; one or more reference circuits to provide reference signals to the switches; and one or more integrator circuits to integrate the output voltages of the power detector circuits. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 25)
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23. A method for imaging using a receiver on an integrated circuit chip, comprising:
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amplifying a radio-frequency (RF) signal at a receiver input, by passing the signal through a low noise amplifier (LNA) module; generating a reference signal; generating an output representative of the power of the RF signal, during a first phase of a control clock, and of the reference signal, during a second phase of the control clock; and generating another output representative of the power of the reference signal, during the first phase of the control clock, and of the RI'"'"' signal, during the second phase of the control clock. - View Dependent Claims (24)
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Specification