Resources Contact Us Home
BIAS voltage generation circuit for an SOI radio frequency switch

Image Number 7 for United States Patent #8131225.

A radio frequency (RF) switch located on a semiconductor-on-insulator (SOI) substrate includes at least one electrically biased region in a bottom semiconductor layer. The RF switch receives an RF signal from a power amplifier and transmits the RF signal to an antenna. The electrically biased region may be biased to eliminate or reduce accumulation region, to stabilize a depletion region, and/or to prevent formation of an inversion region in the bottom semiconductor layer, thereby reducing parasitic coupling and harmonic generation due to the RF signal. A voltage divider circuit and a rectifier circuit generate at least one bias voltage of which the magnitude varies with the magnitude of the RF signal. The at least one bias voltage is applied to the at least one electrically biased region to maintain proper biasing of the bottom semiconductor layer to minimize parasitic coupling, signal loss, and harmonic generation.

  Recently Added Patents
Apparatus and method for sterilizing vessel with electron beam
Redundant power delivery
Integrated wire carrier for electrode array
Radio communication device and sequence length adjusting method
Electrifying roller
Focus detection device and imaging apparatus having the same
Artificial engine sound control unit, approaching vehicle audible system, and electric vehicle having them
  Randomly Featured Patents
Managing common uplink resources in a cellular radio communications system
Electronic device and method of driving the same
Method for fabricating semiconductor packages using mold tooling fixture with flash control cavities
Magnetic recording medium
Brake system for a motorcycle, and motorcycle incorporating same
Electronic part mounting substrate, electronic part, and semiconductor device
Loop-variant PDZ domains as biotherapeutics, diagnostics and research reagents
Circuit modification method
Molding apparatus
Pole reinforcement installation