Inventor: Hung-Ming Chien

Address: Irvine, CA
No. of patents: 25
Last patent issue date: 09/04/2012

Number	Title	Issue Date
8260212	Method and system for a reconfigurable filter that is utilized by a RF transmitter and a RF receiver which are integrated on a single substrate An RF receiver and an RF transmitter, which are integrated in a single substrate, are operable to share a single reconfigurable filter to perform RF receiver filtering and RF transmitter filtering. The reconfigurable filter is configured to operate as a bandpass fil...	09/04/2012
8131247	Method and system for an intermediate frequency (IF) channel select filter with an integrated alternate adjacent channel interference (AACI) filter An alternate adjacent channel interference (AACI) filter is integrated into an intermediate frequency (IF) channel select filter to filter received RF signals. The IF channel select filter is an IF staged structure comprising successive IF stages. Each of the succes...	03/06/2012
8116677	Adaptive radio transceiver An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged ...	02/14/2012
8102010	Apparatus for reducing parasitic capacitance in a semiconductor device A semiconductor device exhibiting low parasitic resistance comprises a first substrate characterized by a first resistivity; a second substrate characterized by a second resistivity, a third substrate and a metal element. These substrates form a multi-layer semicond...	01/24/2012
8050636	Apparatus and method for generating RF without harmonic interference A transmitter capable of operating according to a first standard that does not interfere with a nearby frequency generator operating according to a second standard. The transmitter comprises an oscillator, a frequency divider, a mixer, and a filter. The oscillator i...	11/01/2011
7904037	Adaptive radio transceiver with offset PLL with subsampling mixers An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged ...	03/08/2011
7884675	Phase locked loop including a frequency change module A phase locked loop (PLL) includes a detector, a charge pump, a loop filter, a voltage controlled oscillator (VCO), a divider, and a frequency change module. The detector provides a phase difference based on a reference signal and a feedback signal. The charge pump ...	02/08/2011
7869781	Method and system for mitigating the effects of pulling in multiple phase locked loops in multi-standard systems Certain aspects of a method and system for mitigating effects of pulling in multiple phase locked loops in multi-standard systems may include selecting an input frequency range of operation at a voltage controlled oscillator based on a particular wireless band of op...	01/11/2011
7840198	Method and system for processing signals in a high performance receive chain Aspects of a method and system for processing signals in a high performance receive chain may include amplifying radio frequency signals in amplifier chains in a multistandard radio frequency front-end, comprising one or more shared processing stages, and combining,...	11/23/2010
7834707	Linearized charge pump having an offset A charge pump provides charge based on a phase difference between a reference signal and a feedback signal. The relationship between the charge and the phase difference is referred to as the charge phase relationship. Charge pumps typically have a non-linear charge ...	11/16/2010
7783251	Adaptive radio transceiver An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged ...	08/24/2010
7599677	Charge pump circuit having switches A charge pump circuit that supplies current to an offset current of an output signal for an oscillating circuit is disclosed. The charge pump circuit includes a first switch and a second switch. The first switch is coupled to a gate of an output diode that provides ...	10/06/2009
7590387	High accuracy voltage controlled oscillator (VCO) center frequency calibration circuit Methods and systems for calibrating a frequency of a circuit are disclosed herein and may comprise dividing a feedback frequency of an output frequency signal to generate a divided frequency signal. Open loop calibration may be performed based on a binary search of ...	09/15/2009
7512378	Adaptive radio transceiver An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged ...	03/31/2009
7482881	Phase locked loop including a frequency change module A phase locked loop (PLL) includes a detector, a charge pump, a loop filter, a voltage controlled oscillator (VCO), a divider, and a frequency change module. The detector provides a phase difference based on a reference signal and a feedback signal. The charge pump ...	01/27/2009
7379722	Frequency allocation using a single VCO An apparatus and method to use a single voltage controlled oscillator (VCO) to generate frequencies to cover multiple frequency bands. The single VCO generates local oscillator signals for more than one frequency band of a communication standard or protocol, such as...	05/27/2008
7343144	Frequency synthesizer using PLL architecture for wireless frequency allocation An apparatus method to provide a frequency synthesizer using a phase locked loop in a communication device to provide a particular frequency allocation to generate an output from the PLL. The synthesizer includes a phase locked loop (PLL) circuit that has a feedback...	03/11/2008
7242256	Phase frequency detector with programmable delay Methods and systems for locking a phase locked loop (PLL) are disclosed herein. A first impulse signal may be generated utilizing an input reference signal. A second impulse signal may be generated utilizing an input divided signal. A programmable delay signal may b...	07/10/2007
7236062	Low phase noise crystal oscillator with supply noise filtering A low phase noise crystal oscillator with supply noise filtering is provided and may comprise receiving an input voltage at a positive potential input of an oscillator circuit, which may comprise an oscillator core and a buffer coupled to an output of the oscillator...	06/26/2007
7221234	VCO with switchable varactor for low KVCO variation A method and system for VCO with switchable varactor for low KVCO variation is provided. Aspects of a method for controlling a signal may comprise controlling an oscillating frequency of a time varying signal in a circuit, and controlling a change in the oscillating...	05/22/2007
7205857	Oscillator with quadrature output in a cross-coupled configuration An oscillator that provides a quadrature output and has a cross-coupled configuration is disclosed. The oscillator generates an output signal having a frequency. Two phase shift circuits, or stages, are activated by a control signal to provide phase shifts within th...	04/17/2007
7196559	Multi-modulus divider for high speed applications A multi-modulus divider for high speed applications is provided and may comprise a multistage divider generating a divided signal from an output portion of a divider module for a current stage. The divided signal may be fed back to an input portion of the divider mo...	03/27/2007
7057466	Varactor-based ring oscillator A varactor-based ring oscillator to produce an output signal and method therefore are disclosed. The ring oscillator includes a first phase shift circuit having a first pole. The ring oscillator also includes a second phase shift circuit having a second pole and a t...	06/06/2006
7042302	VCO with power supply rejection enhancement circuit An oscillating circuit having a noise reduction circuit is disclosed. The noise reduction circuit is coupled to the current source for the oscillating circuit. The noise reduction circuit reduces a bias noise component from a bias current, and a supply noise compone...	05/09/2006
6995625	Oscillator with quadrature output in a cross-coupled configuration An oscillator that provides a quadrature output and has a cross-coupled configuration is disclosed. The oscillator generates an output signal having a frequency. Two phase shift circuits, or stages, are activated by a control signal to provide phase shifts within th...	02/07/2006

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Inventor: Hung-Ming Chien