Seungli Kim from San Francisco, CA

Seungli Kim Phones & Addresses

Rc Oscillator
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US Patent:

6917249, Jul 12, 2005
Filed:

Nov 27, 2002
Appl. No.:

10/305920
Inventors:

James R. Kuo - Cupertino CA, US
SeungLi Kim - San Francisco CA, US
Assignee:

National Semiconductor Corporation - Santa Clara CA
International Classification:

H03K003/02
US Classification:

331143, 331111, 331175, 331177 R, 327132, 327172
Abstract:

An oscillator has timing characteristics that are determined by resistor and capacitor values. The circuit comprises an astable multivibrator and a current reference. The multivibrator comprises a first and a second timing capacitor. The multivibrator is configured to produce an oscillating output signal in response to charging and discharging the first and the second timing capacitors. The current reference is configured to control the rate of change of charge of the first and second timing capacitors. The current reference is determined in part by the resistor values.