RF reception system and integrated circuit with programmable filter and methods for use therewith
View Patent ↗An integrated circuit includes an on-chip antenna interface, coupled to an off-chip antenna interface having at least one off-chip filter component that forms a programmable filter with the at least one off-chip filter component. The programmable filter is programmable based on a control signal. An RF receiver generates inbound data in response to a received signal from the programmable filter.
1. A (radio frequency) RF reception system comprising:
an off-chip antenna interface that includes at least one off-chip bandpass filter component coupleable to an antenna;
an integrated circuit that includes:
an on-chip antenna interface, coupled to the off-chip antenna interface, that forms a programmable filter with the at least one off-chip filter component, wherein the programmable filter is programmable based on a control signal; and
an RF receiver, coupled to the programmable filter, that generates inbound data in response to a received signal from the programmable filter.
2. The RF reception system of claim 1 wherein the on-chip antenna interface includes:
an adjustable impedance coupled to the at least one off-chip filter component; and
a control module, coupled to the adjustable impedance, that generates the control signal in response to a frequency selection signal to control the adjustable impedance to a first value.
3. The RF reception system of claim 2 wherein the RF receiver demodulates the received signal at a selected one of a plurality of carrier frequencies in response to the frequency selection signal.
4. The RF reception system of claim 1 wherein a pass band of the programmable filter is adjusted based on the frequency selection signal.
5. The RF reception system of claim 1 wherein a peak gain of the programmable filter is adjusted based on the frequency selection signal.
6. The RF reception system of claim 1 wherein a total impedance of the programmable filter is adjusted based on the frequency selection signal.
7. The RF reception system of claim 1 wherein the adjustable impedance includes at least one adjustable reactive network element.
8. The RF reception system of claim 7 wherein the at least one adjustable reactive network element includes a plurality of fixed reactive network elements and a switching network for selectively coupling the plurality of fixed reactive network elements in response to the control signal.
9. The RF reception system of claim 8 wherein the switching network selects at least one of the plurality of fixed reactive network elements and that deselects the remaining ones of the plurality of fixed reactive network elements in response to the control signals.
10. The RF reception system of claim 1 wherein the integrated circuit is a voice, data and RF integrated circuit.
11. An integrated circuit comprising:
an on-chip antenna interface, coupled to an off-chip antenna interface having at least one off-chip bandpass filter component, that forms a programmable bandpass filter with the at least one off-chip bandpass filter component, wherein the programmable bandpass filter is programmable based on a control signal; and
an RF receiver, coupled to the programmable bandpass filter, that generates inbound data in response to a received signal from the programmable bandpass filter.
12. The integrated circuit of claim 11 wherein the on-chip antenna interface includes:
an adjustable impedance coupled to the at least one off-chip bandpass filter component; and
a control module, coupled to the adjustable impedance, that generates the control signal in response to a frequency selection signal to control the adjustable impedance to a first value.
13. The integrated circuit of claim 12 wherein the RF receiver demodulates the received signal at a selected one of a plurality of carrier frequencies in response to the frequency selection signal.
14. The integrated circuit of claim 11 wherein the adjustable impedance includes at least one adjustable reactive network element.
15. The integrated circuit of claim 14 wherein the at least one adjustable reactive network element includes a plurality of fixed reactive network elements and a switching network for selectively coupling the plurality of fixed reactive network elements in response to the control signal.
16. The integrated circuit of claim 15 wherein the switching network selects at least one of the plurality of fixed reactive network elements and that deselects the remaining ones of the plurality of fixed reactive network elements in response to the control signals.
17. The integrated circuit of claim 11 wherein the integrated circuit is a voice, data and RF integrated circuit.