Apparatus and methods are disclosed related to tuning a resonant frequency of an LC
circuit. In some implementations, the LC circuit can be embodied in a low noise amplifier …

Techniques for providing voltage-controlled oscillator circuits having improved phase noise
performance and lower power consumption. In an exemplary embodiment, a voltage …

(57) ABSTRACT A novel and useful oscillator topology demonstrating an improved phase
noise performance that exploits the time variant phase noise model with insights into the …

(57) ABSTRACT A dual-mode oscillator and a multi-phase oscillator includes a mode
switching circuit to switch between two operating modes and obtain oscillation signals …

Embodiments of a tunable radio frequency (RF) diplexer and methods of duplexing
transmission and receive signals are disclosed. In one embodiment, the RF diplexer …

Atunable oscillator circuit is disclosed. The tunable oscillator circuit includes an
inductor/capacitor (LC) tank circuit com prising a primary inductor coupled in parallel with a …

Apparatus and methods are also disclosed related to an oscillator that includes a switching
network configured to tune a resonant frequency of a resonant circuit. One such apparatus …

(DCO) incorporating a split transformer configuration. The LC-tank oscillator exhibits a
significant reduction in area Such that it is comparable in size to conventional ring oscil …

Apparatus and methods are also disclosed related to tuning a quality factor of an LC circuit.
In some implementations, the LC circuit can be embodied in a low-noise amplifier (LNA). A …

BACKGROUND Voltage-controlled oscillators (VCOs) and digitally-con trolled oscillators
(DCO's) are used to generate a signal hav ing an oscillation frequency determined by a …