Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
High frequency variable gain amplification device, control device, high frequency variable gain frequency-conversion device, and communication device










Image Number 11 for United States Patent #7245890.

A high frequency variable gain amplification device 100 includes: a feedback circuit 103 capable of changing a feedback impedance to adjust the gain of an amplifier 101 in accordance with a control signal from a control device 200; and a current consumption adjustment circuit 102 capable of adjusting current consumption of the amplifier 101. The control device 200 controls the feedback impedance and the current consumption based on a desired signal power level and an undesired signal power level. If the desired signal power level exceeds a predetermined value, the control device 200 reduces the feedback impedance to increase the amount of a feedback signal, thereby allowing the amplifier 101 to operate with low gain so as to prevent the distortion characteristic from being reduced and to reduce the current consumption.








 
 
  Recently Added Patents
Smooth silicon-containing films
Measurement system service for a vehicle instrument panel
Imaging apparatus for calculating a histogram to adjust color balance
Tool bag with removable tool wall
State detection device, electronic apparatus, measurement system and program
Vehicle control apparatus
Distylium plant named `PIIDIST-I`
  Randomly Featured Patents
Cartridge case and apparatus for producing the same
Valve assembly and method for high temperature internal combustion engines
High deflection capping system for inkjet printheads
Expandable vertebral prosthesis
Bumper mounted cord set
Flat heat exchanger tube
Contact finger with transverse depression, matchable in the depression on a corresponding contact finger
Photoelectric imaging method and apparatus
Preparation and use of improved pearlescent pigments of high light fastness
Inhibitors of sex steroid biosynthesis and methods for their production and use