Patents by Inventor Chih-Min Liu

Chih-Min Liu 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).

  • Publication number: 20050206433
    Abstract: The present invention provides a means for transferring direct current voltage levels to digital output voltage levels that includes a first voltage selection block, an inverter, a second voltage selection block, and a voltage transfer block. One end of the voltage selection block is connected to an analog voltage, and the other end is connected to one end of the inverter. The input of the inverter is connected to an input signal; besides, one of its ends is connected to the first voltage selection block and another end is connected to one end of the second voltage selection block. Moreover, one end of the second voltage selection block is connected to the ground. Furthermore, the output is used to receive the inverter output signal and output a digital output signal.
    Type: Application
    Filed: December 14, 2004
    Publication date: September 22, 2005
    Inventor: Chih-Min Liu
  • Publication number: 20050139885
    Abstract: A capacitor pair structure for increasing the match thereof has two finger electrode structures interlacing with each other in parallel and a common electrode being between the two finger electrode structures to form a capacitor pair structure with an appropriate ratio. Also, the capacitor pair structure could further increase its entire capacitance through vias connecting the same capacitor pair structures on different metal layers.
    Type: Application
    Filed: October 14, 2004
    Publication date: June 30, 2005
    Inventor: Chih-Min Liu
  • Publication number: 20050116755
    Abstract: The present invention provides one hysteresis circuit device. The hysteresis circuit device includes an input voltage level generator, a switch, and a comparator. The input voltage level generator is used to receive an input signal and output a high input voltage and a low threshold voltage. The switch is used to receive the high input voltage and the low threshold voltage, and output a switch output signal according to a digital signal. The comparator has one terminal used to receive the switch output signal, and another terminal used to receive a reference signal. Then, the comparator outputs the digital signal. The hysteresis circuit device can change their voltage levels by an external circuit; therefore, the noise resulting from the input signal can be avoided and the problem of false detection of the comparator can be solved.
    Type: Application
    Filed: September 21, 2004
    Publication date: June 2, 2005
    Inventor: Chih-Min Liu