Inventor
CHANG TZUNG-CHIN
US28 patents
Patents
28 patentsUS6686769B1Feb 3, 2004
Programmable I/O element circuit for high speed logic devices
ALTERA CORP146 citations99
US7221193B1May 22, 2007
On-chip termination with calibrated driver strength
ALTERA CORP67 citations98
US6911860B1Jun 28, 2005
On/off reference voltage switch for multiple I/O standards
ALTERA CORP59 citations96
US6825692B1Nov 30, 2004
Input buffer for multiple differential I/O standards
ALTERA CORP38 citations96
US7200769B1Apr 3, 2007
Self-compensating delay chain for multiple-date-rate interfaces
ALTERA CORP17 citations93
US7002384B1Feb 21, 2006
Loop circuitry with low-pass noise filter
ALTERA CORP38 citations93
US6870413B1Mar 22, 2005
Schmitt trigger circuit with adjustable trip point voltages
ALTERA CORP47 citations93
US7425844B1Sep 16, 2008
Input buffer for multiple differential I/O standards
ALTERA CORP14 citations92
US7218155B1May 15, 2007
Techniques for controlling on-chip termination resistance using voltage range detection
ALTERA CORP32 citations92
US7215143B1May 8, 2007
Input buffer for multiple differential I/O standards
ALTERA CORP20 citations92
US6970024B1Nov 29, 2005
Over-voltage protection of integrated circuit I/O pins
ALTERA CORP34 citations92
US6630844B1Oct 7, 2003
Supply voltage detection circuit
ALTERA CORP33 citations92
US6549045B1Apr 15, 2003
Circuit for providing clock signals with low skew
ALTERA CORP22 citations92
US7205806B2Apr 17, 2007
Loop circuitry with low-pass noise filter
ALTERA CORP12 citations84
US7088140B1Aug 8, 2006
High speed IO buffer using auxiliary power supply
ALTERA CORP14 citations84
US7295040B1Nov 13, 2007
High speed IO buffer using auxiliary power supply
ALTERA CORP7 citations74
US7212054B1May 1, 2007
DLL with adjustable phase shift using processed control signal
ALTERA CORP6 citations74
US6731142B1May 4, 2004
Circuit for providing clock signals with low skew
ALTERA CORP12 citations74
US6731137B1May 4, 2004
Programmable, staged, bus hold and weak pull-up for bi-directional I/O
ALTERA CORP9 citations74
US7119579B2Oct 10, 2006
Supply voltage detection circuit
ALTERA CORP10 citations73
US6870400B1Mar 22, 2005
Supply voltage detection circuit
ALTERA CORP11 citations73
US6747903B1Jun 8, 2004
Configurable decoder for addressing a memory
ALTERA CORP8 citations73
US7725755B1May 25, 2010
Self-compensating delay chain for multiple-date-rate interfaces
ALTERA CORP2 citations63
US7098690B2Aug 29, 2006
Programmable I/O element circuit for high speed logic devices
ALTERA CORP2 citations63
US7091760B1Aug 15, 2006
DLL with adjustable phase shift using processed control signal
ALTERA CORP5 citations63
US6853215B1Feb 8, 2005
Programmable I/O element circuit for high speed logic devices
ALTERA CORP2 citations63
US7710149B1May 4, 2010
Input buffer for multiple differential I/O standards
ALTERA CORP0 citations51
US7308659B1Dec 11, 2007
Apparatus and method for RTL modeling of a register
ALTERA CORP0 citations48