Title:
LEVEL SHIFTERS AND HIGH VOLTAGE LOGIC CIRCUITS
Document Type and Number:
WIPO Patent Application WO/2011/011639
Kind Code:
A3
Abstract:
Level shifters and high voltage logic circuits implemented with MOS transistors having a low breakdown voltage relative to the voltage swing of the input and output signals are described. In an exemplary design, a level shifter (102) includes a driver circuit (110) and a latch (140). The driver circuit receives an input signal (Vinp, Vinn) having a first voltage range and provides a drive signal (Vdrp, Vdrn) having a second voltage range. The first and second voltage ranges may cover positive and negative voltages or different ranges of positive voltages. The latch receives the drive signal and provides an output signal (Voutp, Voutn) having the second voltage range. The driver circuit may generate a control signal (Vctrip, Vctrin) having a full voltage range based on the input signal and may then generate the drive signal based on the control signal. The level shifter may be used to implement a high voltage logic circuit.
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Inventors:
CASSIA MARCO (US)
Application Number:
PCT/US2010/042968
Publication Date:
March 31, 2011
Filing Date:
July 22, 2010
Export Citation:
Assignee:
QUALCOMM INC (US)
CASSIA MARCO (US)
CASSIA MARCO (US)
International Classes:
H03K3/356; H03K19/0185
Foreign References:
| US20070236272A1 | 2007-10-11 | |||
| US20060066349A1 | 2006-03-30 | |||
| US20070159218A1 | 2007-07-12 | |||
| EP0859469A2 | 1998-08-19 |
Attorney, Agent or Firm:
MOBARHAN, Ramin (5775 Morehouse DriveSan Diego, Califonia, US)
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