A system for implementing a tuner comprising a Radio Frequency (RF)
circuit, a filter disposed in a signal path in said RF circuit, a first
negative resistance unit in communication with said filter adapted to
cancel one or more resistive elements in said filter, a frequency
measurement unit in communication with said filter, wherein said first
negative resistance unit is adapted to cause said filter to act as an
oscillator, and wherein said frequency measurement unit is adapted to
measure oscillations of said filter and to calculate a center frequency
of said filter therefrom.