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Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Inventor:
Song; Yonghua
Address:
Saratoga, CA
No. of patents:
21
Patents:












Patent Number Title Of Patent Date Issued
8294503 Method and apparatus for reducing jitter in a transmitter October 23, 2012
A driver chain circuit and methods are provided. The driver chain circuit includes a plurality of voltage regulators and an inverter chain. The plurality of voltage regulators are operable to provide a bias to respective groups of one or more inverters within the inverter chain. The
8228110 Low power, low voltage phase interpolator July 24, 2012
A phase interpolator is provided that, in one implementation, includes first and second interpolator modules, each having an output in communication with an output node. The first interpolator includes an input to receive a first plurality of input phase signals, and a selector to se
8077807 Adaptive timing using clock recovery December 13, 2011
Circuits and methods are provided for adjusting a frequency of a local clock signal in approximating a frequency of a host clock signal. A phase locked loop generates a local clock signal having a first phase and a first frequency. An offset adjustment circuit receives timing information
7899422 Sigma delta modulated phase lock loop with phase interpolation March 1, 2011
A sigma delta modulated phase lock loop reduces quantization noise by using phase interpolation to increase an effective frequency resolution of the dividing ratio of a divider.
7809339 Voltage regulator for high performance RF systems October 5, 2010
A voltage regulator comprises a master regulator circuit that receives a reference signal and that generates a feedback signal and a master bias signal. The master bias signal is based on the reference signal and the feedback signal. N slave regulator circuits receive the master bias
7808317 Baseband filter start-up circuit October 5, 2010
An electrical circuit includes an amplifier. The amplifier includes an input circuit in communication with an input of the amplifier. A start-up circuit is in communication with the input circuit. The start-up circuit is configured to generate a start-up signal to enable subsequent o
7528657 Baseband filter start-up circuit May 5, 2009
An electrical circuit comprises a plurality of amplifiers. Each of the plurality of amplifiers comprises an input circuit in communication with an input of the amplifier and a start-up circuit in communication with the input circuit. The start-up circuit is configured to generate a s
7459975 Baseband filter start-up circuit December 2, 2008
An amplifier comprises an input circuit that receives an input to the amplifier. A start-up circuit communicates with the input circuit, generates a start-up signal, and turns off the start-up signal when an output of the amplifier reaches a threshold voltage. The start-up circuit in
7259600 Scalable integrated circuit architecture August 21, 2007
An integrated circuit architecture comprises a phase lock loop (PLL) circuit that includes a feedback circuit that receives a reference signal. A voltage controlled oscillator (VCO) generates an output signal to an input of the feedback circuit. A master transistor has a control term
7239199 Amplifier calibration July 3, 2007
Apparatus, systems, and methods implementing techniques for reducing the variation of a DC offset are described. An input signal is amplified to produce an intermediate signal. The intermediate signal is processed to produce a feedback signal and an output signal, where the output signal
7190936 Voltage regulator for high performance RF systems March 13, 2007
A voltage regulator includes a master regulator circuit that receives a reference signal, that generates a master bias signal and that includes a transistor having a first gain. A first slave regulator circuit includes a first transistor having a second gain that is substantially equal t
7190199 Scalable integrated circuit architecture with analog circuits March 13, 2007
An integrated circuit architecture includes a temperature-process tracking circuit that includes a master transistor with a control terminal, a first terminal and a second terminal. The temperature-process tracking circuit generates a drive signal that is output to the control terminal.
7184799 Method and apparatus for reducing wake up time of a powered down device February 27, 2007
A dummy circuit is provided to which a bias circuit of a low noise amplifier (LNA) can be coupled to during power down of the LNA. The dummy circuit maintains the bias circuit at an approximately normal operating state to reduce wake up time of the LNA.
7181180 Sigma delta modulated phase lock loop with phase interpolation February 20, 2007
A sigma delta modulated phase lock loop reduces quantization noise by using phase interpolation to increase an effective frequency resolution of the dividing ratio of a divider.
7180369 Baseband filter start-up circuit February 20, 2007
An electrical circuit includes an amplifier. The amplifier includes an input circuit in communication with an input of the amplifier. The amplifier includes a start-up circuit in communication with the input circuit. The start-up circuit is configured to generate a start-up signal to
7173489 Programmable gain voltage buffer February 6, 2007
A programmable gain voltage buffer circuit with a programmable gain may include transistors in parallel with resistors. The transistors may be used as variable resistors, with the resistors predominating the equivalent resistances at output points in different branches of the buffer
7167018 Circuits, architectures, systems and methods for overvoltage protection January 23, 2007
Circuits, architectures, a system and methods for protecting against overvoltages in a high-speed differential signal or circuit. The circuit generally includes (a) a differential signal transmission line, (b) a common mode circuit coupled to and configured to reduce a swing of the d
7119590 Scalable integrated circuit architecture October 10, 2006
An integrated circuit architecture comprises a phase lock loop (PLL) circuit that includes a feedback circuit that receives a reference signal. A voltage controlled oscillator (VCO) generates an output signal to an input of the feedback circuit. A master transistor has a control term
7026839 Circuits, architectures, systems and methods for overvoltage protection April 11, 2006
Circuits, architectures, a system and methods for protecting against overvoltages in a high-speed differential signal or circuit. The circuit generally includes (a) a differential signal transmission line, (b) a common mode circuit coupled to and configured to reduce a swing of the d
6998888 Scalable integrated circuit architecture with analog circuits February 14, 2006
An integrated circuit architecture includes a phase lock loop (PLL) circuit that includes a feedback circuit that receives a reference signal. A voltage controlled oscillator (VCO) has an output that communicates with an input of the feedback circuit. A master transistor has a contro
6359499 Temperature and process independent CMOS circuit March 19, 2002
A analog function is constructed based on CMOS (complimentary metal-oxide semiconductor) technology. It is capable of providing an output voltage, which is proportional to the product of two input voltages. This analog function is insensitive to temperature and process variations by usin










 
 
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