DAVID J KENNY
Nursing in State College, PA
License number
Pennsylvania TGPN016981
Category
Nursing
Type
Graduate Practical Nurse Permit
Address
Address
State College, PA 16801
Personal information
See more information about DAVID J KENNY at radaris.comName
Address
Phone
3816 Etta St, Philadelphia, PA 19114
816 Rr 816, Pittsburgh, PA 15212
6901 Walnut St, Pittsburgh, PA 15225
4650 Canton St, Philadelphia, PA 19127
1206 Brighton Rd, Pittsburgh, PA 15233
Professional information
Method Of Making A Surface Mountable Pcb Module
US Patent:
7246434, Jul 24, 2007
Filed:
Oct 11, 2004
Appl. No.:
10/711869
Inventors:
Craig M. Taylor - Pleasanton CA, US
David J. Kenny - State College PA, US
David J. Kenny - State College PA, US
Assignee:
Pericom Semiconductor Corp. - San Jose CA
International Classification:
H01K 3/10
US Classification:
29852, 29830, 29832, 29840, 29846
Abstract:
A printed-circuit board (PCB) module has co-planar solder pads on a bottom surface. The solder pads can be surface-mounted to pads on a main board, allowing the PCB module to be surface mounted without wire leads extending from the PCB module substrate. A cavity is formed between the solder pads on the bottom surface. The cavity is formed by milling away some of the thickness of a sacrificial insulator layer, which is the insulator layer under the solder-pad metal layer. The sacrificial insulator layer can be made thicker to allow for milling the cavity without milling into inner metal layers on the PCB module. After milling away much of the sacrificial insulator layer, stand-offs remain under the solder pads, providing a stand-off gap between the top of the cavity and the solder pads when soldered to the main board. The stand-off gap allows for cleaning under the PCB module.
Redundant Back-Up Pll Oscillator Phase-Locked To Primary Oscillator With Fail-Over To Back-Up Oscillator Without A Third Oscillator
US Patent:
7173495, Feb 6, 2007
Filed:
Apr 5, 2005
Appl. No.:
10/907558
Inventors:
David J. Kenny - State College PA, US
Kyusun Choi - State College PA, US
Kyusun Choi - State College PA, US
Assignee:
Pericom Semiconductor Corp - San Jose CA
International Classification:
H03B 5/12
US Classification:
331 49, 331 2, 331 47, 327 20, 327294
Abstract:
A redundant-source clock generator has only two oscillators, rather than three oscillators. A secondary oscillator is phase-locked to a primary clock from a primary oscillator using a phase detector, charge pump, and filter that generate a control voltage to the secondary oscillator that determine the frequency of a secondary clock. The primary clock is compared to the secondary clock to detect primary clock failure. When clock failure is detected, a mux is switched to select a delayed secondary clock rather than a delayed primary clock to output as a system clock. Since the mux receives delayed clock signals, clock-failure detection has additional time to detect the clock failure before the clock failure is propagated through the mux. When the primary oscillator fails and the clock failure is detected, the phase detector stops comparing a feedback secondary clock to the primary clock and instead holds the control voltage steady.