Auto-tuning system for an On-Chip RF filter
First Claim
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1. A method for auto-calibrating a frequency response of a Radio Frequency Filter (“
- auto-tuned RF filter”
) on a Radio Frequency Single Integrated Circuit (“
RFSIC”
), wherein the RFSIC includes a phase-locked loop (“
PLL”
) and an auto-calibration circuit, the method comprising;
receiving a control word from the auto-calibration circuit; and
auto-calibrating the frequency response of the auto-tuned RF filter with the control word.
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Abstract
A Radio Frequency Receiver on a Single Integrated Circuit (“RFSIC”) is described. The RFSIC may include a mixer, a phase-locked loop (“PLL”) in signal communication with the mixer, and an on-chip auto-tuned RF filter in signal communication with both the mixer and PPL, such that the same PLL simultaneously tunes the frequency of the VCO and the frequency response of the auto-tuned RF filter.
64 Citations
20 Claims
-
1. A method for auto-calibrating a frequency response of a Radio Frequency Filter (“
- auto-tuned RF filter”
) on a Radio Frequency Single Integrated Circuit (“
RFSIC”
), wherein the RFSIC includes a phase-locked loop (“
PLL”
) and an auto-calibration circuit, the method comprising;receiving a control word from the auto-calibration circuit; and auto-calibrating the frequency response of the auto-tuned RF filter with the control word. - View Dependent Claims (2)
- auto-tuned RF filter”
-
3. A method for auto-calibrating a frequency response of a Radio Frequency Filter (“
- auto-tuned RF filter”
) having digitally switched frequency adjustment components that allow the adjustment of a frequency response characteristic of the auto-tuned RF filter on a Radio Frequency Single Integrated Circuit (“
RFSIC”
), wherein the RFSIC includes an auto-calibration circuit, the method comprising;receiving a control word from the auto-calibration circuit; and digitally switching the frequency adjustment components of the auto-tuned RF filter to tune the frequency response characteristic of the auto-tuned RF filter responsive to the control word. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10)
- auto-tuned RF filter”
-
11. A Radio Frequency Single Integrated Circuit (“
- RFSIC”
) comprising;a radio-frequency (RF) filter including digitally switched frequency adjustment components that allow the adjustment of a frequency response characteristic of the RF filter in response to a control word; and an autocalibration circuit coupled to the digitally switched frequency adjustment components and coupled to receive a reference signal, the autocalibration circuit including; a comparator coupled to the reference signal and to a signal produced by the digitally switched frequency adjustment components; and a state machine, coupled to the comparator and configured to step through successive values for the control word until the comparator indicates that the signal produced by the digitally switched frequency adjustment components corresponds to the control signal. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
- RFSIC”
Specification