IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0005958
(2007-12-28)
|
등록번호 |
US-7656222
(2010-03-31)
|
우선권정보 |
KR-10-2007-0112036(2007-11-05) |
발명자
/ 주소 |
|
출원인 / 주소 |
|
대리인 / 주소 |
Blakely, Sokoloff, Taylor & Zafman
|
인용정보 |
피인용 횟수 :
3 인용 특허 :
3 |
초록
▼
An apparatus for generating an internal voltage includes an output-voltage detecting unit for detecting a voltage level of an internal voltage, an oscillating unit for generating a periodic signal in response to a detection signal from the output-voltage level detecting unit, a first driving-voltage
An apparatus for generating an internal voltage includes an output-voltage detecting unit for detecting a voltage level of an internal voltage, an oscillating unit for generating a periodic signal in response to a detection signal from the output-voltage level detecting unit, a first driving-voltage level detecting unit for detecting an increase of a voltage level of a driving voltage, a second driving-voltage level detecting unit for detecting a decrease of a voltage level of the driving voltage, a period control unit for controlling a period of the periodic signal in response to output signals of the first and second driving-voltage level detecting units, and a charge pumping unit for generating the internal voltage by charge-pumping the driving voltage in response to an output signal from the period control unit.
대표청구항
▼
What is claimed is: 1. An apparatus for generating an internal voltage comprising: an output-voltage level detecting unit for detecting a voltage level of an internal voltage; an oscillating unit for generating a periodic signal in response to a detection signal from the output-voltage level detect
What is claimed is: 1. An apparatus for generating an internal voltage comprising: an output-voltage level detecting unit for detecting a voltage level of an internal voltage; an oscillating unit for generating a periodic signal in response to a detection signal from the output-voltage level detecting unit; a first driving-voltage level detecting unit for detecting a decrease in a voltage level of a driving voltage; a second driving-voltage level detecting unit for detecting an increase in voltage level of the driving voltage; a period control unit for controlling a period of the periodic signal in response to output signals of the first and second driving-voltage level detecting units; and a charge pumping unit for generating the internal voltage by charge-pumping the driving voltage in response to an output signal from the period control unit. 2. The apparatus of claim 1, wherein the period control unit decreases the period of the periodic signal in response to the output signal from the first driving-voltage level detecting unit and increases the period of the periodic signal in response to the output signal from the second driving-voltage level detecting unit. 3. The apparatus of claim 1, wherein the period control unit includes: a first divider for generating a first divided signal wherein the first divided signal has a first period more than the period of the periodic signal or a second period substantially identical to the period of the periodic signal in response to a first detection signal from the first driving-voltage level detecting unit; and a second divider for generating a second divided signal wherein the second divided signal has a second period more than the period of the first divided signal or a second period substantially identical to the period of the first divided signal in response to a second detection signal from the second driving-voltage level detecting unit. 4. The apparatus of claim 3, wherein the first divider includes: an input unit for producing an input signal in response to the periodic signal; a control signal generating unit for producing a driving control signal using the input signal and the first detection signal; a period converting unit for outputting an output signal in response to the driving control signal, the input signal and a feedback signal wherein the output signal has a period shorter than the input signal or is substantially identical to the input signal; a divided-signal output unit for outputting the first divided signal in response to the output signal from the period converting unit; and a feedback unit for outputting the feedback signal, which is correspondent to the first divided signal, to the period converting unit. 5. The apparatus of claim 4, wherein the input unit includes an inverter for outputting the input signal by inverting the period signal. 6. The apparatus of claim 4, wherein the period converting unit includes: a first inverting unit for inverting the feedback signal in response to the input signal; a second inverting unit for inverting the input signal in response to an output signal of the first inverting unit; a third inverting unit for inverting an output signal of the second inverting unit in response to the input signal; and a driving control unit for initializing output nodes of the second and third inverting units in response to the driving control signal. 7. The apparatus of claim 6, wherein the control signal generating unit includes: a negative driving control signal output unit for outputting a negative driving control signal in response to the first detection signal and the input signal; and a positive driving control signal output unit for outputting a positive driving control signal, wherein the positive driving control signal is out of phase with the negative driving control signal. 8. The apparatus of claim 7, wherein the driving control unit includes: a first MOS transistor having a gate to which the negative driving control signal is applied and a source-drain path between a voltage terminal of the driving voltage and the output node of the third inverting unit; and a second MOS transistor having a gate to which the positive driving control signal is applied and a drain-source path between a ground voltage supply terminal and the output node of the second inverting unit. 9. The apparatus of claim 3, wherein the second divider includes: an input unit for producing an input signal in response to the first divided signal; a control signal generating unit for producing a driving control signal using the input signal and the second detection signal; a period converting unit for outputting an output signal in response to the driving control signal, the input signal and a feedback signal wherein the output signal has a period longer than the input signal or is substantially identical to the input signal; a divided-signal output unit for outputting the second divided signal in response to the output signal from the period converting unit; and a feedback unit for outputting the feedback signal, which is correspondent to the second divided signal, to the period converting unit. 10. The apparatus of claim 9, wherein the input unit includes an inverter for outputting the input signal by inverting the first divided signal. 11. The apparatus of claim 9, wherein the period converting unit includes: a fourth inverting unit for inverting the feedback signal in response to the input signal; a fifth inverting unit for inverting the input signal in response to an output signal of the fourth inverting unit; a sixth inverting unit for inverting an output signal of the fifth inverting unit in response to the input signal; and a driving control unit for initializing output nodes of the fifth and sixth inverting units in response to the driving control signal. 12. The apparatus of claim 11, wherein the control signal generating unit includes: an inverter for inverting the second detection signal; a negative driving control signal output unit for outputting a negative driving control signal in response to an output signal of the inverter and the input signal; and a positive driving control signal output unit for outputting a positive driving control signal, wherein the positive driving control signal is out of phase with the negative driving control signal. 13. The apparatus of claim 12, wherein the driving control unit includes: a third MOS transistor having a gate to which the negative driving control signal is applied and a source-drain path between a voltage terminal of the driving voltage and the output node of the fifth inverting unit; and a fourth MOS transistor having a gate to which the positive driving control signal is applied and a drain-source path between a ground voltage supply terminal and the output node of the fourth inverting unit. 14. The apparatus of claim 1, wherein the first driving-voltage level detecting unit includes: a first voltage divider for dividing the driving voltage; and a detection signal generating unit for outputting a first detection signal by detecting whether the driving voltage is lower than a low reference voltage. 15. The apparatus of claim 14, wherein the first detection signal generating unit includes: a first differential amplifier for sensing and amplifying a voltage difference between the low reference voltage and the first divided voltage in response to an activation of a bias voltage; and a first output unit for outputting the first detection signal in response to an output signal of the first differential amplifier. 16. The apparatus of claim 14, wherein the second driving-voltage level detecting unit includes: a second voltage divider for dividing the driving voltage; and a detection signal generating unit for outputting a second detection signal by detecting whether the driving voltage is higher than a high reference voltage. 17. The apparatus of claim 16, wherein the high reference voltage is higher than the low reference voltage. 18. The apparatus of claim 17, wherein the second detection signal generating unit includes: a second differential amplifier for sensing and amplifying a voltage difference between the high reference voltage and the second divided voltage in response to an activation of the bias voltage; and a second output unit for outputting the second detection signal in response to an output signal of the second differential amplifier. 19. The apparatus of claim 17, wherein the second divided signal, which is produced based on the case where the driving voltage is positioned between the high reference voltage and the low reference voltage, has the period longer than that which is produced based on the case where the driving voltage is lower than the low reference voltage and has the period shorter than that which is produced based on a case where the driving voltage is higher than the high reference voltage. 20. The apparatus of claim 17, wherein the second divided signal, which is produced based on a case where the driving voltage is lower than the low reference voltage, has the period twice as short as that which is produced based on a case where the driving voltage is positioned between the high reference voltage and the low reference voltage and wherein the second divided signal, which is produced based on a case where the driving voltage is higher than the high reference voltage, has the period twice as long as that which is produced based on a case where the driving voltage is positioned between the high reference voltage and the low reference voltage.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.