Resumes
Resumes
Anand Kudari Phones & Addresses
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Campbell, CA
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San Jose, CA
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3655 Pruneridge Ave, Santa Clara, CA 95051 (408) 247-4923
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109 39Th St, Austin, TX 78751
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1105 Claire Ave, Austin, TX 78703
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9000 Poppy Dr, Dallas, TX 75218 (214) 324-9607
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Sunnyvale, CA
Publications
Us Patents
Oscillator Circuit With Variable Reference Voltage And Current
View pageUS Patent:
7034627, Apr 25, 2006
Filed:
Apr 1, 2004
Appl. No.:
10/816292
Inventors:
Anand D. Kudari - Santa Clara CA, US
Assignee:
National Semiconductor Corporation - Santa Clara CA
International Classification:
H03K 3/02
US Classification:
331143, 331111, 331175, 331177 R, 331176
Abstract:
A relaxation oscillator circuit is configured to provide an output signal. The relaxation oscillator circuit includes two capacitors that are alternatively charged and discharged. Each capacitor is charged by a separate current that is provided by mirroring a reference current. The reference current for the current mirror may be provided by a bias circuit such that the reference current may vary significantly over temperature and supply voltage. Also, the reference current is mirrored to a resistor to provide the reference voltage. The resistor has a temperature coefficient that is substantially zero. Accordingly, the output signal is relatively independent of temperature and supply voltage, even though the reference current and the reference voltage may vary significantly over temperature and supply voltage.