Abstract: A technique includes selecting one out of a plurality of frequency bands and providing a voltage controlled oscillator to generate a mixing signal for the selected frequency band. The technique includes adjusting a frequency gain of the voltage controlled oscillator based on the selected frequency band.

Abstract: An oscillator includes a plurality of varactor cells to receive a control signal to control a frequency of the oscillator. Each of the varactor cells includes a switch that includes a first terninal to receive the control signal and a second terminal such that the switch operates to control a capacitance of the varactor cell in response to a voltage between the first and second terminals. The oscillator includes a bias circuit to provide a different bias voltage to each second terminal and an amplifier that is coupled to the varactor cells to generate an oscillating signal.

Abstract: A technique includes using a first stored energy source to generate a reference signal to circuitry of a supply regulator in response to the regulator being in a startup state. The technique includes using an output signal that is provided by the regulator to generate the reference signal in response to the regulator not being in the startup state.

Abstract: An object of the present invention is to provide an oscillator contributing to a reduction of power dissipation. An oscillator 10 comprises four inductors 11—1, 11—3, 11—2, and 11—4 connected in series to constitute a closed circuit, and four capacitors 12—1, 12—3, 12—2, and 12—4 one ends of which are connected to nodes that are connecting points of the inductors, and another ends of which are held at a power supply VDD. The oscillator 10 is formed on a semiconductor substrate.