Title:
超低電力RC発振器
Document Type and Number:
Japanese Patent JP4510054
Kind Code:
B2
Abstract:
A micropower RC oscillator comprises a current generating section including a current source that generates a current; and a variable resistor of which the magnitude is variably set and which is configured by combining resistor elements at a predetermined ratio, the resistor elements having opposite characteristics to each other with respect to a temperature change, the variable resistor adjusting the magnitude of the generated current; a start-up circuit section connected to the current generating section and fixing a bias operating point to a constant value such that the current generating section stably generates a current; a charge and discharge circuit section including a variable capacitor, of which the magnitude is variably set, and a plurality of transistors, the charge and discharge circuit section charging and discharging the variable capacitor by using the current generated from the current generating section and the plurality of transistors; an oscillation signal output section connected to the charge and discharge circuit section and including a plurality of inverters, the oscillation signal output section outputting an oscillation signal of which the frequency is determined by the resistance of the variable resistor and the capacitance of the variable capacitor; and an inverter driving power supply section mirroring the current generated from the current generating section and then providing the mirrored current as a driving power supply of the inverters.
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Inventors:
Im jun hyun
Kim, myungsu
Kwon, Yongil
Park, Tajun
Kim, myungsu
Kwon, Yongil
Park, Tajun
Application Number:
JP2007146683A
Publication Date:
July 21, 2010
Filing Date:
June 01, 2007
Export Citation:
Assignee:
Samsung Electric Co., Ltd.
International Classes:
H03K4/06; H03K7/08
Domestic Patent References:
| JP60128651A | ||||
| JP2215156A | ||||
| JP3228423A | ||||
| JP5303656A | ||||
| JP2002033644A |
Attorney, Agent or Firm:
Konobu Kato