Patents Assigned to IPGlobal Microelectronics (SiChuan) Co., Ltd.
  • Patent number: 8344804
    Abstract: A common-mode feedback circuit includes an amplifying circuit, a biasing circuit connected with the amplifying circuit, and a feedback loop connecting the amplifying circuit with the biasing circuit. The feedback loop includes a first field effect transistor M1, a eighth field effect transistor M1B connected with the first field effect transistor M1, a tenth field effect transistor M2B and an eleventh field effect transistor MFB connecting the eighth field effect transistor M1B and the tenth field effect transistor M2B. The common-mode voltage value of the common-mode feedback circuit is adjusted by the eleventh field effect transistor MFB. The common-mode feedback circuit has the simple structure and is capable of achieving the common-mode feedback without the peripheral feedback circuit and the input reference voltage.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: January 1, 2013
    Assignee: IPGlobal Microelectronics (SiChuan) Co., Ltd.
    Inventor: Fangping Fan
  • Patent number: 7795942
    Abstract: A stage by stage delay current-summing slew rate controller includes a delay controller, a delay cell array, a current source array, a switch array, a load. The delay cell array includes N delay cells, the switch array includes N switches, and the switch includes N current sources, wherein N>1. The delay controller is connected with the control ports of the delay cells respectively, and the delay cells are connected with the control terminal of the switches respectively. One of the connecting terminals of the switch is connected with the output end of the current source, and the other end of the connecting terminals of the switch is connected with one end of the load, and the other end of the load is connected to the ground.
    Type: Grant
    Filed: May 31, 2009
    Date of Patent: September 14, 2010
    Assignee: IPGlobal Microelectronics (SiChuan) Co., Ltd.
    Inventors: Yong Quan, Guosheng Wu