Resources Contact Us Home
Direct down-conversion receiver with transconductance-capacitor filter and method

Image Number 2 for United States Patent #7139544.

A direct-down conversion receiver may include a transconductance-capacitor (GmC) filter to filter undesirable mixing products and provide a filtered baseband-differential signal. The GmC filter may include first and second transconductance-capacitor (GmC) circuits in series and a transconductance-feedback circuit in feedback with the second transconductance-capacitor circuit. The GmC circuits may comprise cross-coupled pairs of transistors to receive a baseband-differential signal and generate a differential output current. The GmC circuits may also comprise MOSCAPs coupled respectively between the differential inputs of the GmC circuit and internal-feedback nodes. In some embodiments, a substantially-constant bias voltage may be maintained across the voltage-dependent capacitors to allow the voltage-dependent capacitors to provide a substantially constant capacitance.

  Recently Added Patents
RF/optical shared aperture for high availability wideband communication RF/FSO links
Process for producing polyphenylene ether composition
High conductive water-based silver ink
Method for transmitting a signal from a transmitter to a receiver in a power line communication network, transmitter, receiver, power line communication modem and power line communication syst
Systems and methods for sensing external magnetic fields in implantable medical devices
Generating wiki pages from content and transformation objects
System and method for dynamic quality-of-service-based billing in a peer-to-peer network
  Randomly Featured Patents
Data-reproducing device
Method and system for providing artificial intelligence for planning and risk assessment of surgical paths
Process for preparing ortho-(alkylthio)phenols
Rubber-containing resin composition and styrene resin composition containing the same
Trailer assembly for carrying overwidth loads
Propylamines, and their use as fungicides
Case for electronic device
Insulation wrapping strip with variable configuration
Unsaturated hydroximic acid derivatives as per abstract inhibitors
Stabilized trivalent chromium passivate composition and process