Resources Contact Us Home
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
TC-83-derived alphavirus vectors, particles and methods
Downlink scheduling in fractional frequency reuse (FFR) systems
Method for decoding a spatially multiplexed data signal using a maximum likelihood detection
Semiconductor device including a clock generating circuit for generating an internal signal having a coarse delay line, a fine delay line and a selector circuit
Light-reflective anisotropic conductive paste and light-emitting device
Reliable and accurate usage detection of a software application
Semiconductor device having a first conductive member connecting a chip to a wiring board pad and a second conductive member connecting the wiring board pad to a land on an insulator covering
  Randomly Featured Patents
Prioritization of directory scans in cache
Polyphenylene ether resins and compositions having reduced odor and method of reducing odor in same
Method and apparatus for producing composites of materials exhibiting thermoplastic properties
Apparatus and method for comparison of electric power efficiency of lighting sources
Memory system
Base pan for packaged air conditioning unit
Process for producing metallized aluminum nitride substrate
Information processing system, information processing apparatus, processing method thereof, and non-transitory computer-readable storage medium
Ferro magnetic metal-insulator multilayer radio frequency circulator