Claims
- 1. A method for a highly integrated radio receiver design comprising of
an in-phase mixer with one input connected to an RF input signal, and another input connected to a local oscillator signal, a quadrature mixer with one input connected to said RF input signal, and another input connected to a 90 degree phase shifted local oscillator signal, a polyphase image-reject filter with the ability to be tuned to track the intermediate frequency, the input of said polyphase image-reject filter connected to the outputs of said mixers, a tuning circuit with a reference frequency input and whose output is used to control the tuning of said polyphase image-reject filter.
- 2. The method of claim 1 wherein the polyphase filter is followed by a second mixer with one input connected to a divided down local oscillator signal.
- 3. The method of claim 1 wherein the polyphase filter is followed by an intermediate frequency amplifier.
- 4. The method of claim 1 wherein the polyphase filter stage is followed by another polyphase filter stage.
- 5. The method of claim 1 wherein the polyphase filter is preceded by a buffer.
- 6. The method of claim 1 wherein the polyphase filter is preceded by an intermediate frequency amplifier.
- 7. The method of claim 1 wherein the polyphase filter consists of a resistor and capacitor network where the resistors are tunable.
- 8. The method of claim 1 wherein the polyphase filter consists of a resistor and capacitor network where the capacitors are tunable.
- 9. The method of claim 1 wherein the polyphase filter comprises both active and passive elements.
- 10. The method of claim 1 wherein the polyphase filter comprises of an amplifier, resistors, and capacitors.
- 11. The method of claim 1 wherein the receiver is implemented in CMOS technology.
- 12. The method of claim 1 wherein the receiver is implemented in any integrated circuit technology.
Parent Case Info
[0001] This application is based on the provisional application No. 60/431,980 filed on Dec. 10, 2002
Provisional Applications (1)
|
Number |
Date |
Country |
|
60431980 |
Dec 2002 |
US |