Patents by Inventor Mingquan Bao

Mingquan Bao 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: 7626461
    Abstract: The present invention relates to a voltage-to-current transconductance stage arrangement comprising a single-ended input, an emitter-coupled pair of transistors, comprising a first transistor and a second transistor, the emitter of a third transistor, being connected to the collector of said first transistor, and differential output. It further comprises at least one common-collector transistor comprising a fourth transistor connected to the base of said second transistor preferably or optionally also and a fifth transistor connected to the base of said third transistor. The size of said fourth, or fourth and fifth transistors considerably exceed the sizes of said second and third transistors. They are biased at ‘off-state’. An extra inductor at the collector of the transistor may be applied to further increase linearity.
    Type: Grant
    Filed: October 20, 2005
    Date of Patent: December 1, 2009
    Assignee: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Mingquan Bao, Yinggang Li
  • Publication number: 20080287088
    Abstract: The present invention relates to a sub-harmonically pumped conversion mixer arrangement comprising a transistor arrangement and transistor terminals for application of a local oscillator, LO-, signal and application of a radio frequency, RF-, signal and for extraction of a mixed intermediate frequency, IF-, signal. The transistor arrangement comprises at least one NMOS transistor and at least one PMOS transistor. The drain of said at least one NMOS transistor is interconnected with the drain of said at least one PMOS transistor, and in that the gate of said at least one PMOS transistor is interconnected with the gate of said at least one NMOS transistor.
    Type: Application
    Filed: November 23, 2005
    Publication date: November 20, 2008
    Applicant: Telefonaktiebolaget L M Ericsson (Publ)
    Inventors: Mingquan Bao, Harald Jacobsson
  • Publication number: 20080265992
    Abstract: The present invention relates to a voltage-to-current transconductance stage arrangement comprising a single-ended input, an emitter-coupled pair of transistors, comprising a first transistor and a second transistor, the emitter of a third transistor, being connected to the collector of said first transistor, and differential output. It further comprises at least one common-collector transistor comprising a fourth transistor connected to the base of said second transistor preferably or optionally also and a fifth transistor connected to the base of said third transistor. The size of said fourth, or fourth and fifth transistors considerably exceed the sizes of said second and third transistors. They are biased at ‘off-state’. An extra inductor at the collector of the transistor may be applied to further increase linearity.
    Type: Application
    Filed: October 20, 2005
    Publication date: October 30, 2008
    Inventors: Mingquan Bao, Yinggang Li