Resources Contact Us Home
Amplifier having output range that exceeds supply voltage

Image Number 4 for United States Patent #6011440.

Amplifier circuitry is provided having an output voltage range that exceeds its supply rail voltage. Such an amplifier may be useful in battery powered applications calling for driving a high impedance load with a low current, moderate bandwidth signal The amplifier circuitry includes a transconductance amplifier, for providing a high output impedance, and a charge pump DC/DC converter, for providing a high supply voltage to the transconductance amplifier. In one embodiment of the invention, the gain of the amplifier is a function of the input voltage so as to linearize a transfer function between the amplifier input and a response of a load at the amplifier's output.

  Recently Added Patents
Autonomous downlink code selection for femto cells
Gaze tracking password input method and device utilizing the same
Process for the production of alcohol
Network based technique for obtaining operator identifier for mobile devices
Method and apparatus for visual neural stimulation
Crosslinked core/shell polymer particles
Sending targeted product offerings based on personal information
  Randomly Featured Patents
Looseleaf binder having a removable protective envelope and method of making same
Apparatus and method of arrhythmia detection in a subcutaneous implantable cardioverter/defibrillator
Apparatus and methods for programming multilevel-cell NAND memory devices
Removable bridge profile for floor joints
Bucking and wrapping gauge for window installation
Labial pad
Memory device for concurrent and pipelined memory operations
Eye piece and tunable chromatic dispersion compensator using the same
Sail for sports equipment, in particular windsurfing sail, comprised of polyester film
Dynamically determining a community of entities in a communication system