Electron Tube Patents (Class 327/406)
  • Noise cancellation in amplifier systems
    Patent number: 10020781
    Abstract: A low power amplifier architecture that employs a single-ended (single triode) push-pull (SEPP) vacuum tube and output transformer arrangement, and that cancels unwanted amplifier signal components such as hum and noise. The SEPP amplifier operates to cancel power supply ripple and local EMI induced noise in the output transformer by providing reverse polarity of the primary coils of the output transformer.
    Type: Grant
    Filed: January 20, 2017
    Date of Patent: July 10, 2018
    Inventor: Steven M. Fryette
  • Ramp signal output circuit, analog-to-digital conversion circuit, imaging device, method for driving ramp signal output circuit, method for driving analog-to-digital conversion circuit, and method for driving imaging device
    Patent number: 8760213
    Abstract: A circuit configured to output a ramp signal having a potential varying depending on time includes a voltage supply unit configured to supply a plurality of voltages having different amplitudes, a current supply unit, an integration circuit configured to output the ramp signal, and a capacitive element. The voltage supply unit is connected to one terminal of the capacitive element. The integration circuit and the current supply unit are connected to another terminal of the capacitive element.
    Type: Grant
    Filed: September 27, 2012
    Date of Patent: June 24, 2014
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazuhiro Saito, Hiroki Hiyama, Tetsuya Itano, Kohichi Nakamura