Resources Contact Us Home
Highly linear high-speed transconductance amplifier for Gm-C filters

Image Number 2 for United States Patent #6566949.

A transconductance amplifier and method for improving the phase response and linearity. A differential amplifier circuit receives differential signals for amplification on respective bases of input bipolar transistors. The transistors amplify a small signal received on the based connections to produce an amplified output current. The differential amplifier circuit is connected to load impedances which form a cascode transconductance amplifier output stage. Feedback transistors provide a feedback voltage from the emitters of each of the different bipolar transistors to the base, improving the linearity of the differential amplifier. Phase compensation is provided by cross coupling through first and second capacitors a portion of each individual differential signal component to the base connections of the differential amplifier input transistor.

  Recently Added Patents
EpCAM as a reprogramming factor for non-pluripotent cells
Power collecting device, power measuring device, and power collecting method
Composition comprising a mixture of dextro- and levo-amphetamines complexed with ion-exchange resin particles to form drug resin particles
Washing-up bowl
Method and apparatus for coordinating hopping of resources in wireless communication systems
Method and system for reduction of quantization-induced block-discontinuities and general purpose audio codec
Lithographic apparatus and device manufacturing method
  Randomly Featured Patents
Method and apparatus for reading invisible symbol
Device and method for the treatment of semiconductor wafers
System and method for simplifying secure network setup
Non-volatile semiconductor storage device composed of NAND type EEPROM and deletion verification method in non-volatile semiconductor storage device
Shaft seal assembly with inflatable annular member
Circulation of gas-entrained fuel cell coolant
Expandable orthopedic device
Recording unit
Abscess shield