Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Radio frequency bus leveling system










Image Number 7 for United States Patent #5546050.

A bus leveling system for automatically monitoring and maintaining the amplitude of a radio frequency (RF) signal carded on a bus. A two-stage variable gain amplifier (64) is connected in series with the bus. Each stage of the variable gain amplifier is constructed with a PIN diode (84, 86) in a feedback path of the stage. The amplification of the variable gain amplifier is varied by the injection of current into the feedback path to adjust the resistance of the PIN diodes. A control circuit having an RE detector (78) is provided to monitor and adjust the gain generated by the variable gain amplifier. Preferably, the control circuit and the variable gain amplifier are incorporated into an Application Specific Integrated Circuit (ASIC) (62). The RF detector is constructed of two Gilbert multipliers (202, 204) to minimize errors caused by operating condition changes, including variations in power supply voltage, temperature, or process.








 
 
  Recently Added Patents
Digital microwave radio link with adaptive data rate
Flat panel display device and stereoscopic display device
Semiconductor device
Solid-state imaging apparatus
Hand mixer
Local call local switching at handover
Tag-based apparatus and methods for neural networks
  Randomly Featured Patents
Viewing device
Foamed sodium silicate ceramic and method of manufacturing the same
Variable leak gas source
Agricultural grinder mixers
Computer casing
Management of the flow of persons in entertainment environments
Electron gun comprising a tubular electrode having a coiled portion formed therein
Water-reducible resins for coatings and inks
Method of refining of melts by means of a pulverous solid material and/or a gas
Curable compositions composed of silanes with two hydrolyzable groups