KELLY PATRICK MCCLELLAN
Pilots in Irvine, CA
License number
California A1233722
Category
Airmen
Type
Authorized Aircraft Instructor
Address
Address
PO Box 18047, Irvine, CA 92623
Professional information
Analog Pll Clock Recovery Circuit And A Lan Transceiver Employing The Same
US Patent:
5448598, Sep 5, 1995
Filed:
Jul 6, 1993
Appl. No.:
8/088008
Inventors:
Nariman Yousefi - Irvine CA
Benjamin E. Nise - Laguna Niguel CA
Kelly P. McClellan - Irvine CA
Benjamin E. Nise - Laguna Niguel CA
Kelly P. McClellan - Irvine CA
Assignee:
Standard Microsystems Corporation - Hauppauge NY
International Classification:
H04L 700, H04L 2536, H04L 2540, H03D 324
US Classification:
375376
Abstract:
A VSLI transceiver chip incorporating an improved analog PLL circuit for recovering a digital clock signal from a digital data signal having pulse widths which may vary during each data cycle. The analog PLL clock recovery circuit comprises a phase detector, a gain control circuit, a variable current charge pump, a loop filter and a variable frequency oscillator. The phase detection means for detecting, during each data cycle, the phase error between the digital data signal and recovered digital clock signal, and produces first end second digital control pulse signals in response to the detection of the phase error. The gain control means produces third and fourth digital control pulse signals during each data cycle. The value of the third and fourth control pulse signals during each data cycle depends on the value of the digital data signal, the value of the recovered clock signal, and the value of the second digital control pulse signal during the data cycle, and the change in value of the third and fourth control pulse signals is responsive to the change in the value of the recovered digital clock signal. The variable current charge pump receives the first and second digital control pulse signals.
Phase-Locked-Loop With Linear Combination Of Charge Pump And Current Controlled Oscillator
US Patent:
5687201, Nov 11, 1997
Filed:
Sep 24, 1996
Appl. No.:
8/719310
Inventors:
Kelly Patrick McClellan - Irvine CA
Khosrow Haj Sadeghi - Irvine CA
Khosrow Haj Sadeghi - Irvine CA
Assignee:
Standard Microsystems Corporation - Hauppauge NY
International Classification:
H03D 324
US Classification:
375374
Abstract:
A phase-locked-loop (PLL) has a current controlled oscillator (ICO) whose gain varies with its input current. The PLL also contains a charge pump that controls the input current of the ICO and therefore the output frequency of the ICO. The charge pump has a gain that is controlled by the ICO input current in a manner which linearizes the combination of charge pump and ICO. This results in a substantially constant loop gain for a PLL.
Transconductance-Capacitance Filter With Extended Control Range
US Patent:
5612648, Mar 18, 1997
Filed:
Mar 14, 1995
Appl. No.:
8/403931
Inventors:
Kelly P. McClellan - Irvine CA
Khosrow H. Sadeghi - Irvine CA
Khosrow H. Sadeghi - Irvine CA
Assignee:
Standard Microsystems Corporation - Hauppauge NY
International Classification:
H03F 345, H03F 3191
US Classification:
330253
Abstract:
A G. sub. m -C filter is formed using transconductor elements having first and second degeneration FETs to which first and second control signals are applied. A phase-locked-loop is used to generate the control signals. The control range of the transconductor elements is increased so that the frequency response of the filter can be maintained over increased ranges of various parameters (e. g. , supply voltage variations, temperature variations, etc. ).