Patent ID: 7403075

Claim:
An ultra wide band signal generator, comprising: a tunable active inductor for generating harmonic signals having power strengths substantially equal to each other within a non-linear operating range, the tunable active inductor being capable of tuning a value thereof, comprising: a first transistor having a source connected to a voltage source and a gate connected to a first bias voltage; a second transistor having a drain connected to a drain of the first transistor and a gate connected to a second bias voltage; a third transistor having a drain connected to a source of the second transistor and a source connected to ground; a fourth transistor having a drain connected to a gate of the third transistor, a source connected to the ground, and a gate connected to a third bias voltage; a fifth transistor having a source connected to the drain of the fourth transistor and a drain connected to the voltage source; and a tunable feedback resistor interposed between the drain of the first transistor and a gate of the fifth transistor; an oscillator for amplifying and outputting the harmonic signals generated from the tunable active inductor by frequency-transiting the harmonic signals into high frequency bands; and a filter for selectively outputting one of the harmonic signals output from the oscillator.