Patents by Inventor Yeupeng Yan

Yeupeng Yan 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).

  • Patent number: 8212648
    Abstract: A variable attenuator, including at least a one-stage attenuator circuit, including at least a signal input end, a signal output end, a common grounded end, a first serial resistor, a first parallel resistor, a first parallel switch, and a first serial switch. The first serial resistor is disposed between the signal input and the signal output end. The signal input end, the signal output end, and the first serial resistor form a main signal circuit. The first parallel resistor is connected between the main signal circuit and the common grounded end. The first parallel switch is connected in parallel with the first serial resistor, and the first serial switch is connected in series with the first parallel resistor. During operation of the variable attenuator, as the parallel switch is switched on to eliminate attenuation, the serial switch is switched off.
    Type: Grant
    Filed: February 11, 2010
    Date of Patent: July 3, 2012
    Assignee: Yantel Corporation
    Inventors: Yuejun Yan, Yeupeng Yan