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).
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Publication number: 20130009627Abstract: A phase detector (100, 400, 800) comprising a balun (150) and input ports (116) at each of the balun's balanced ports. The phase detector (100, 400, 800) has four devices (105, 115, 110, 155) for measuring a signal's amplitude: —a first device (105) at a first input port (116), —a second device (115) at a second input port (117), —a third device (110) between the input ports (116, 117), connected to the ports via a passive component (120, 125; 120?, 125; 120?, 125?), —a fourth device (155) at the unbalanced port of the balun (150), The difference between the amplitude values of the third (110) and fourth (155) devices indicate the phase difference and the difference between the amplitude values measured by the first (110) and second (115) devices indicates the phase difference in the region of 0-2?.Type: ApplicationFiled: March 25, 2010Publication date: January 10, 2013Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventor: Mingquan Bao
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Patent number: 8344811Abstract: In a dual-hand capable voltage-controlled oscillator (VCO) device at least two voltage-controlled oscillator units (VCO1, VCO2) are coupled via a reactive component (A) and each said at least one voltage-controlled oscillator unit (VCO1, VCO2) further being connected to at least a respective external switching device (B1, B2) adapted to control an operating frequency of the (VCO) device.Type: GrantFiled: May 30, 2008Date of Patent: January 1, 2013Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventor: Mingquan Bao
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Patent number: 8344787Abstract: A combination mixer arrangement comprising a first mixer and a second mixer coupled in parallel between first and second input ports and an output port. The mixers are arranged to be driven simultaneously by an input signal provided at the second input port. They are de-coupled, so a bias voltage applied at the first input port provides dc bias simultaneously for the mixers to enable gain expansion of the first mixer responsive to an increase in said input signal and thereby an improved linearity for the combination mixer arrangement.Type: GrantFiled: December 22, 2006Date of Patent: January 1, 2013Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Mingquan Bao, Yinggang Li
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Patent number: 8299838Abstract: A circuit with inputs for first (LO) and second (IF) unbalanced signals at respective first and second frequencies, also comprising a mixer for the first and second input signals to produce a third signal (RF) at a third frequency at an output port. The mixer comprises first and second transistors which are cross-coupled to each other. Output terminals of the transistors are connected to the output port, and the mixer also comprises a first impedance connected to ground. The mixer, by means of the transistors and the first impedance is an active balun for the first input signal (IF), and the input port for the second signal (LO) comprises a second impedance, so that the first and second impedances together act as a passive balun for the second signal (LO).Type: GrantFiled: March 25, 2008Date of Patent: October 30, 2012Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventor: Mingquan Bao
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Publication number: 20120262248Abstract: An arrangement (100, 400, 500, 600) comprising a first plate (110, 410, 510, 610) and a second plate (120, 420, 520, 620) at a first distance (di) from each other with an overlap between them. The arrangement also comprises a third (130, 430, 530, 630) and a fourth (140, 440, 540, 640) plate between the first and second plates in said overlap so that the third and fourth plates do not overlap each other. All plates are made of an electrically conducting material, are essentially flat and plane and are separated from each other by a dielectric material. The first plate comprises an input/output port (111, 411, 511, 611), the second plate comprises a ground port (112), and the third and fourth plates comprise an output/input port (131, 141, 431, 441, 531, 541, 551). The arrangement will serve as a power divider, a power combiner or as a balm.Type: ApplicationFiled: December 10, 2009Publication date: October 18, 2012Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (publ)Inventor: Mingquan Bao
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Patent number: 8249541Abstract: The present invention relates to a sub-harmonically pumped conversion mixer arrangement that includes 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 includes at least one NMOS transistor and at least one PMOS transistor. The drain of the at least one NMOS transistor is interconnected with the drain of the at least one PMOS transistor, and in that the gate of the at least one PMOS transistor is interconnected with the gate of the at least one NMOS transistor.Type: GrantFiled: November 23, 2005Date of Patent: August 21, 2012Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Mingquan Bao, Harald Jacobsson
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Patent number: 8169269Abstract: In a Hartley voltage controlled oscillator (VCO) circuit comprising two inductors (Ld, Lg), a transistor (Q1) and a varactor (C), the two inductors (Ld, Lg) are arranged as a coupled inductor pair to enable positive mutual inductance (M) between them and reduce the size of the VCO.Type: GrantFiled: September 25, 2007Date of Patent: May 1, 2012Assignee: Telefonaktiebolaget LM Ericsson (publ)Inventor: Mingquan Bao
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Publication number: 20120062304Abstract: The invention discloses a mixer circuit (10, 20, 30, 410, 60) comprising a first mixer component (11, 21) with a first (13, 23) and a second (12, 22) input port for a first and a second input signal respectively and an output port (14, 24) for outputting a mixed signal. According to the invention, the mixer circuit (10, 20, 30, 410, 60) also comprises a transformer (15) which connects the first (13, 23) and second (12, 22) input ports of the mixer component (11, 21) inductively via an inverting coupling. In one embodiment, the mixer circuit (30, 410, 60) also comprises inputs for DC-bias of one (13) of the input ports and of the output port (14), as well as an impedance (31) as a filter at the output port.Type: ApplicationFiled: May 20, 2009Publication date: March 15, 2012Inventor: Mingquan Bao
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Patent number: 8125282Abstract: In a dual band capable voltage controlled oscillator VCO circuit comprising two voltage controlled oscillator units VCO1, VCO2, the voltage controlled oscillator units VCO1, VCO2 are synchronized and connected via at least two coupled transmission lines TL1, TL2, the transmission lines (TL1, TL2) are arranged to operate according to one of two modes to enable varying a combined inductance of the synchronized oscillator units VCO1, VCO2 and the oscillation frequency for the voltage controlled oscillator circuit VCO.Type: GrantFiled: October 23, 2007Date of Patent: February 28, 2012Assignee: Telefonaktiebolaget LM Ericsson (Publ)Inventors: Mingquan Bao, Björn Albinsson
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Publication number: 20120032746Abstract: An oscillator circuit (100, 200, 300, 10, 11) comprising a resonator (105) connected serially with a series to series feedback amplifier (110, 92), in which the series to series amplifier comprises a feedback network (210, 91) which has an impedance value which is below a certain first predefined limit and a phase value which increases with the operational frequency of the oscillator circuit with a rate which is above a second predefined limit. In one embodiment, the impedance value of the feedback network (210, 91) also varies with the operational frequency of the oscillator circuit, but is always below said first predefined value within the operational frequency of the oscillator circuit.Type: ApplicationFiled: April 20, 2009Publication date: February 9, 2012Applicant: TELEFONAKTIEBOLGET L M ERICSSON (PUBL)Inventor: Mingquan Bao
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Patent number: 8040166Abstract: In one aspect, the present invention provides a frequency multiplier. In some embodiments, the frequency multiplier includes: a first transistor and a second transistor, wherein a first terminal of the first transistor is connected to a third terminal of the second transistor through a first capacitor, and a first terminal of the second transistor is connected to a third terminal of the first transistor through a second capacitor. The frequency multiplier may also include a balun, wherein the third terminal of the first transistor is connected to a terminal of the balun, and the third terminal of the second transistor is connected to a different terminal of the balun.Type: GrantFiled: June 16, 2008Date of Patent: October 18, 2011Assignee: Telefonaktiebolaget L M Ericsson (publ)Inventor: Mingquan Bao
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Publication number: 20110215876Abstract: Embodiments of the present invention relate to a self injection locked voltage controlled oscillator arrangement, a pair of coupled first and second voltage controlled oscillator devices are arranged on a chip, an amplifier device is arranged on the same of the refection type chip, and an off-chip delay line is arranged with one terminal connected to an output terminal of the coupled first and second voltage controlled oscillator devices, and on terminal adapted to reflect a signal from the output terminal, the amplifier device being arranged to amplify an injection signal from said output terminal and to supply the amplified injection signal to one of said first and second voltage controlled oscillation devices to provide a VCO arrangement that exhibits low phase noise and a small size.Type: ApplicationFiled: November 18, 2008Publication date: September 8, 2011Inventors: Mingquan Bao, Thomas Lewin, Yinggang Li
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Patent number: 7952445Abstract: In a voltage controlled oscillator circuit comprising two transistors, the first terminals of each said two transistors, are coupled together and to a supply voltage, two interconnected resonator units, and each of said two resonator units couples a respective second terminal of said two transistors to third terminals of both said transistors.Type: GrantFiled: October 30, 2006Date of Patent: May 31, 2011Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Mingquan Bao, Harald Jacobsson, Yinggang Li
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Publication number: 20110095792Abstract: A frequency multiplier including some embodiments, the frequency multiplier includes: a first transistor and a second transistor, wherein a first terminal of the first transistor is connected to a third terminal of the second transistor through a first capacitor, and a first terminal of the second transistor is connected to a third terminal of the first transistor through a second capacitor. The frequency multiplier also includes a balun, wherein the third terminal of the first transistor is connected to a terminal of the balun, and the third terminal of the second transistor is connected to a different terminal of the balun.Type: ApplicationFiled: June 16, 2008Publication date: April 28, 2011Applicant: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL)Inventor: Mingquan Bao
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Publication number: 20110074513Abstract: In a dual-band capable voltage-controlled oscillator (VCO) device at least two voltage-controlled oscillator units (VCO1, VCO2) are coupled via a reactive component (A) and each said at least one voltage-controlled oscillator unit (VCO1, VCO2) further being connected to at least a respective external switching device (B1, B2) adapted to control an operating frequency of the A (VCO) device.Type: ApplicationFiled: May 30, 2008Publication date: March 31, 2011Applicant: Telefonaktiebolaget L M Ericsson (publ)Inventor: Mingquan Bao
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Publication number: 20110001540Abstract: A circuit with inputs for first (LO) and second (IF) unbalanced signals at respective first and second frequencies, also comprising a mixer for the first and second input signals to produce a third signal (RF) at a third frequency at an output port. The mixer comprises first and second transistors which are cross-coupled to each other. Output terminals of the transistors are connected to the output port, and the mixer also comprises a first impedance connected to ground. The mixer, by means of the transistors and the first impedance is an active balun for the first input signal (IF), and the input port for the second signal (LO) comprises a second impedance, so that the first and second impedances together act as a passive balun for the second signal (LO).Type: ApplicationFiled: March 25, 2008Publication date: January 6, 2011Inventor: Mingquan Bao
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Publication number: 20100271086Abstract: In a dual band capable voltage controlled oscillator VCO circuit comprising two voltage controlled oscillator units VCO1, VCO2, the voltage controlled oscillator units VCO1, VCO2 are synchronized and connected via at least two coupled transmission lines TL1, TL2, the transmission lines [TL1, TL2) are arranged to operate according to one of two modes to enable varying a combined inductance of the synchronized oscillator units VCO1, VCO2 and the oscillation frequency for the voltage controlled oscillator circuit VCO.Type: ApplicationFiled: October 23, 2007Publication date: October 28, 2010Inventors: Mingquan Bao, Bjorn Albinsson
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Publication number: 20100207695Abstract: In a Hartley voltage controlled oscillator (VCO) circuit comprising two inductors (Ld, Lg), a transistor (Q1) and a varactor (C), the two inductors (Ld, Lg) are arranged as a coupled inductor pair to enable positive mutual inductance (M) between them and reduce the size of the VCO.Type: ApplicationFiled: September 25, 2007Publication date: August 19, 2010Inventor: Mingquan Bao
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Publication number: 20100141325Abstract: A combination mixer arrangement comprising a first mixer and a second mixer coupled in parallel between first and second input ports and an output port. The mixers are arranged to be driven simultaneously by an input signal provided at the second input port. They are de-coupled, so a bias voltage applied at the first input port provides dc bias simultaneously for the mixers to enable gain expansion of the first mixer responsive to an increase in said input signal and thereby an improved linearity for the combination mixer arrangement.Type: ApplicationFiled: December 22, 2006Publication date: June 10, 2010Inventors: Mingquan Bao, Yinggang Li
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Publication number: 20100073100Abstract: In a voltage controlled oscillator circuit comprising two transistors, the first terminals of each said two transistors, are coupled together and to a supply voltage, two interconnected resonator units, and each of said two resonator units couples a respective second terminal of said two transistors to third terminals of both said transistors.Type: ApplicationFiled: October 30, 2006Publication date: March 25, 2010Inventors: Mingquan Bao, Harald Jacobsson, Yinggang Li