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
Low-staining room temperature curable coating composition
Aggregating completion messages in a sideband interface
Method of fabricating semiconductor light emitting device
Passive translational velocity measurement from optical information
Mobile tablet information handling system support
Near-field optical disk having surface plasmon amplification by stimulated emission of radiation
Bend resistant cable
  Randomly Featured Patents
Printing assembly and printing method for contemporaneous print jobs
End plate for switch box for interior mount on wall surface
Locally synchronous shared BIST architecture for testing embedded memories with asynchronous interfaces
Projection image display apparatus
Disk brake caliper mounting bracket
Anti-clog caps for rain gutters and the like
Interconnect and cooling system for a semiconductor device
Motor drive circuit and electronics
Coherency control system, coherency control apparatus and coherency control method
Pivoting fairings for a thrust reverser