Methods and apparatus for implementing a receiver on a monolithic integrated circuit

Abstract

A monolithic integrated circuit includes a tuner and a SAW filter function. The tuner receives a radio frequency (RF) television signal that has a range of fundamental frequencies from 55 mega hertz (Mhz) to 880 Mhz. The tuner down converts the RF television signal to an intermediate frequency (IF) television signal that has a low fundamental frequency. In one embodiment, the SAWF filter performs the SAW filter function on the IF television signal. In another embodiment, the SAWF filter performs the SAW filter function at baseband. An IF processor for processing the IF television signal to generate a video television signal and an audio television signal is disclosed.

1 . A monolithic integrated circuit comprising: 
 a tuner for receiving radio frequency (RF) television signals and down converting the RF television signals to intermediate frequency (IF) television signals, the tuner comprising: 
 at least one tunable filter comprising a plurality of discrete selectable capacitive, inductive, or resistive elements configured for a particular frequency response, wherein the at least one tunable filter does not require a power supply voltage; and  
   an IF processor, coupled to the tuner, for down converting the IF television signals to baseband television signals.    
   
   
       2 . The monolithic integrated circuit of  claim 1 , wherein the RF television signals are isolated from ripple voltage in the tuner.  
   
   
       3 . The monolithic integrated circuit of  claim 1 , wherein the capacitive, inductive, or resistive elements are configured in parallel and individually selectable or deselectable to change the frequency response of the at least one tunable filter.  
   
   
       4 . The monolithic integrated circuit of  claim 1 , wherein a capacitive, inductive, or resistive element is selected or deselected to add or remove capacitive, inductive, or resistive value to the at least one tunable filter.  
   
   
       5 . The monolithic integrated circuit of  claim 1 , wherein a capacitive, inductive, or resistive element is selectable using a binary code.  
   
   
       6 . The monolithic integrated circuit of  claim 1 , wherein the at least one tunable filter comprises a first component comprising a capacitive, inductive, or resistive component and a second component comprising a capacitive, inductive, or resistive component.  
   
   
       7 . The monolithic integrated circuit of  claim 6 , wherein: 
 the first component comprises a single capacitive, inductive, or resistive element; and    the second component comprises a plurality of selectable capacitive, inductive, or resistive elements configured for a particular frequency response.    
   
   
       8 . The monolithic integrated circuit of  claim 6 , wherein the first and second components each comprise a plurality of selectable capacitive, inductive, or resistive elements configured for a particular frequency response.  
   
   
       9 . The monolithic integrated circuit of  claim 8 , wherein the capacitive, inductive, or resistive elements of the first and second components are configured in parallel and are individually selectable or deselectable to change the frequency response of the at least one tunable filter.  
   
   
       10 . The monolithic integrated circuit of  claim 8 , wherein the capacitive, inductive, or resistive elements of the first component is selectable using a first binary code and the capacitive, inductive, or resistive elements of the second component is selectable using a second binary code.  
   
   
       11 . The monolithic integrated circuit of  claim 1 , wherein the first component comprises a capacitive component and the second component comprises a resistive component.  
   
   
       12 . The monolithic integrated circuit of  claim 1 , wherein the first component comprises a capacitive component and the second component comprises an inductive component.  
   
   
       13 . The monolithic integrated circuit of  claim 1 , wherein the at least one tunable filter comprises a bandpass or notch filter.  
   
   
       14 . The monolithic integrated circuit of  claim 1 , wherein the at least one tunable filter comprises two or more tunable filters, each tunable filter comprising a plurality of discrete selectable capacitive, inductive, or resistive elements configured for a particular frequency response, wherein each tunable filter does not require a power supply voltage.  
   
   
       15 . The monolithic integrated circuit of  claim 1 , wherein the monolithic integrated circuit comprises a closed circular alternating current (AC) loop.  
   
   
       16 . The monolithic integrated circuit of  claim 1 , wherein the RF television signals comprise a range of fundamental frequencies from 55 mega hertz (Mhz) to 210 Mhz.  
   
   
       17 . The monolithic integrated circuit of  claim 1 , wherein the RF television signals comprise a plurality of different channels and the at least one tunable filter is tuned to one of the plurality of different channels.