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
Integrated circuit devices having conductive structures with different cross sections
Enhancing user experiences using aggregated device usage data
Food-grade flour from dry fractionated corn germ and collet composition and method for producing same
Method for etched cavity devices
Retrievable outgoing audio messaging
Redistribution layer (RDL) with variable offset bumps
Color imaging device
  Randomly Featured Patents
Method to form shallow trench isolation with rounded upper corner for advanced semiconductor circuits
Initiation and support of video conferencing using instant messaging
Address bus for stackable computer board connectors
Multi-axis adjustable conveyor
Method for manufacturing semiconductor memory and method for manufacturing capacitor
Reflector for use in an artificial lighting device
Enhanced scrolling technique for context menus in graphical user interfaces
Solar collector having tank and glazing construction
High density stacking chair
Infrared observing system