Integrated Device Technology, Inc.

Ran Li

Chuying Mao

Jean-Marc Roger Mourant

Feng-Jung Huang

An apparatus comprises a first circuit and a second circuit. The first circuit generally comprises differential symmetric band extension circuitry. The second circuit generally comprises coupled inductor coils configured to convert between differential and single-ended signal formats.

Compact balanced radio frequency balun facilitating easy integration

Wide band quadrature signal generation includes a frequency synthesizer generating a LO or 2&#xd7;LO signal, a polyphase filter coupled to receive the LO signal and generate first in-phase and quadrature LO signals, a 2:1 frequency divider coupled to receive the 2&#xd7;LO signal and generate second in-phase and quadrature LO signals, and a LO signal selector for selecting either the first or second in-phase LO signals as an output in-phase LO signal and either the first or second quadrature LO signals as an output quadrature LO signal based on an output frequency. In some embodiments, when the output frequency is above a threshold, the first in-phase and quadrature LO signals are selected as the output in-phase and quadrature LO signals and when the output frequency is at or below the threshold, the second in-phase and quadrature LO signals are selected as the output in-phase and quadrature LO signals.

Circuits and systems for wideband quadrature signal generation

An impedance-matched amplifier utilizing a feed-forward linearization technique involving multiple negative feedbacks and distortion compensation without active tail current sources reduces noise, distortion, power consumption and heat dissipation requirements and increases linearity, dynamic range, signal-to-noise-ratio, sensitivity and quality of service. Some differential amplifier embodiments of the invention consume less than 2 mA at 5 Volts or 10 mW power consumption per 1 mW in peak and sustained output IPperformance above 40 dBm. In contrast, for an input signal frequency of 200 MHz, a 16 dB gain state-of-the-art differential amplifier consumes 100 mA at 5 Volts with a peak output IPof 36 dBm while an implementation of a 16 dB gain differential amplifier embodying the invention consumes 77.7 mA at 5 Volts with a peak output IPof 46 dBm and sustained at or above 40 dBm over a wide frequency range.

Growing community of inventors

Winchester, MA, United States of America

Ran Li