Patent ID: 7394505
Filing Date: 2008-07-01
Classification: H04N

Abstract:
1. A television cable tuner front end comprising: a front end input port for receiving an input signal; a front end output port; a first radio frequency path electrically coupled to the front end input port; a second radio frequency path electrically coupled to the front end input port; a first mixer circuit having a first input port, a first output port and a second input port and disposed within the first radio frequency path for receiving the input signal at the first input port, an oscillating signal at the second input port, and for providing a first output signal at the first output port thereof; a low noise amplifier circuit having an input port and an output port and disposed within the second radio frequency path for in a first mode of operation receiving the input signal at the front end input port, for amplifying the input signal within a predetermined frequency band, and for providing an amplified signal at the output port thereof, and in a second mode of operation for other than amplifying the input signal; and, a second mixer circuit having a first input port, a first output port and a second input port and disposed within the second radio frequency path for in the first mode of operation receiving the amplified signal at the first input port, an oscillating signal at the second input port, and for providing a second output signal at the first output port thereof, wherein the first output signal and the second output signal are selectably coupled to the front end output port.