Signal-tracking RF bandstop filter

Weakly coupled tunable RF receiver architecture

Weakly coupled tunable RF receiver architecture

Programmable baseband filters supporting auto-calibration for a mobile digital cellular television environment

Fine gain tuning

Tuner and front-end circuit thereof

Tracking filter for a television tuner

Six port linear network single wire multi switch transceiver

Method and apparatus to adjust a tunable reactive element

TWO STAGE SURGE PROTECTION FOR SINGLE WIRE MULTI SWITCH TRANSCEIVER

Programmable baseband filters supporting auto-calibration for a mobile digital cellular television environment

Front end circuit

Switch-able band-tracking input filter for combination tuner

Tuner

Tuner and transformer formed by printed circuit board thereof

Automatic antenna tuning unit for software-defined and cognitive radio

Multiband receiving apparatus and multiband transmitting apparatus using tunable filter

Variable tuning circuit using variable capacitance diode and television tuner

Low Noise, High Linearity TV Tuner Architecture with Switched Fixed-Gain LNA

Programmable baseband filters supporting auto-calibration for a mobile digital cellular television environment

Intermediate frequency circuit for television tuner with improved intermediate frequency characteristic

Bandpass filter with integrated variable gain function using improved resistor array

Bandpass filter with integrated variable gain function

Programmable IF frequency filter for enabling a compromise between DC offset rejection and image rejection

Broadband integrated digitally tunable filters