Patents by Inventor Peter C. Allworth

Peter C. Allworth has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Multi-stage operational amplifier for interstage amplification in a pipeline analog-to-digital converter
    Patent number: 6577185
    Abstract: An operational amplifier for a pipeline analog-to-digital converter (ADC). The operational amplifier includes a cascaded chain of differential amplifiers, each differential amplifier including resistive-averaged common mode feedback to produce a common mode voltage for the differential amplifier, a particular differential amplifier of the chain having the highest gain of the gains of the differential amplifiers. The operational amplifier has one or more feedback paths each including a compensation capacitor to compensate the operational amplifier.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: June 10, 2003
    Assignee: Cisco Systems Wireless Networking (Australia) Pty. Limited
    Inventors: Rodney J. Chandler, Jeffrey N. Harrison, Peter C. Allworth
  • Pipeline analog-to-digital converter with common mode following reference generator
    Patent number: 6486820
    Abstract: A pipeline analog-to-digital converter (ADC) includes cascaded stages for resolving at least one bit of an analog voltage. Each stage has an analog input, one or more reference voltage inputs, and one or more digital outputs. The analog voltage is coupled to the analog input of the first stage. Each stage but the last has an analog output connected to the analog input of the next stage, and includes an operational amplifier that has one or more differential amplifiers having a common mode voltage. The pipeline ADC includes a reference generator to generate the one or more reference voltages for the stages. The reference generator includes a circuit to track the common mode voltage of the differential amplifiers such that the generated reference voltages are relative the common mode voltages of the differential amplifiers.
    Type: Grant
    Filed: August 15, 2001
    Date of Patent: November 26, 2002
    Assignee: Cisco Systems Wireless Networking (Australia) Pty Limited
    Inventors: Peter C. Allworth, Rodney J. Chandler, Jeffrey N. Harrison
  • Infusion pump
    Patent number: 4919650
    Abstract: A portable infusion pump assembly utilizing continuous drive propulsion means (8) to effect automatic and incremental displacement of a plunger (5) within a disposable syringe (3) so as to deliver accurately repeatable volumes of fluid from the syringe (3) over a predetermined period of time.Intermittent drive of the continuous drive propulsion means (8) is effected. Comparison of desired delivery rate with actual delivery rate is made by use of angular displacement signals received from a shaft encoder (10) attached to the shaft of the continuous propulsion means (8).This method of control also allows indirect measurement of fluid pressure in the syringe (3) without the need for a pressure sensor to be located in direct contact with the fluid being delivered.
    Type: Grant
    Filed: March 29, 1988
    Date of Patent: April 24, 1990
    Assignee: Bionica Pty. Limited
    Inventors: Vladimir Feingold, Peter C. Allworth