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
Anti-reductive high-frequency ceramic dielectric material sintered at low temperature and matched with copper internal electrode
Extreme ultraviolet light source device and method for generating extreme ultraviolet light
Ion generation using wetted porous material
Multibranched polymer and method for producing the same
Navigation system and navigation apparatus
System and method for providing definitions
Package for product
  Randomly Featured Patents
Coded control for vehicle engine ignition circuit
Pin lock lidded cup
Auditing data integrity
Process for preparing thermally stable super-soft polyurethane elastomer
Laparoscopic retractor
Tiered satellite internet delivery system
Synthesis of DNA using substituted phenylacetyl-protected nucleotides
Erasure means and data storage system incorporating improved erasure means
Method for producing remotely a picture display device storing one or more associated audio messages
Tansmission arrangement