Reference voltage providing circuit
AssigneeFaraday Technology Corp.
InventorsHan-Chi Liu, Wen-Cheng Yen
Life of this patent
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Abstract
A reference voltage providing circuit. The operation amplifier includes a non-reverse input terminal, a reverse input terminal and an output terminal coupled to the reverse input terminal for outputting an output voltage. The reference voltage generator is coupled to the non-reverse input terminal. The loading is coupled to the output terminal. The current source provides a starting current. The switching device is coupled between the current source and the output terminal, and turned on by an accelerating charging signal to pass the starting current to the loading through the first output terminal. The pulse output device outputs the accelerating charging signal.
Claims11
A reference voltage providing circuit, comprising:
- an operational amplifier having a first non-reverse input terminal, a first reverse input terminal and an output terminal coupled to the first reverse input terminal for outputting an output voltage;
- a reference voltage generator coupled to the first non-reverse input terminal;
- a loading coupled to the output terminal;
- a current source for providing a starting current;
- a switching device coupled between the current source and the output terminal, and turned on by an accelerating charging signal to pass the starting current to the loading through the output terminal;
- a pulse output device for outputting the accelerating charging signal;
- and
- a voltage detection device for detecting the output voltage, outputting an enabling signal to start the pulse output device when the output voltage is lower than a first voltage, and outputting a disabling signal to turn off the pulse output device when the output voltage is higher than a second voltage.
A reference voltage providing circuit, comprising:
- an operational amplifier having a first non-reverse input terminal, a first reverse input terminal, an output terminal coupled to the first reverse input terminal for outputting an output voltage, a current source for providing a starting current, and a switching device coupled between the current source and the output terminal;
- a reference voltage generator coupled to the first non-reverse input terminal;
- a loading coupled to the output terminal;
- a pulse output device for outputting the accelerating charging signal to turn on the switching device so as to pass the starting current to the loading through the output terminal;
- and
- a voltage detection device for detecting the output voltage, and outputting an enabling signal to start the pulse output device when the output voltage is lower than a first voltage, and outputting a disabling signal to turn off the pulse output device when the output voltage is higher than a second voltage.
A reference voltage providing circuit, comprising:
- an operational amplifier having a first non-reverse input terminal, a first reverse input terminal, and an output terminal coupled to the first reverse input terminal for outputting an output voltage;
- a reference voltage generator coupled to the first non-reverse input terminal;
- a capacitive loading coupled to the output terminal;
- a current source for providing a starting current;
- a switching device coupled between the current source and the output terminal, and turned on by an accelerating charging signal to pass the starting current to the capacitive loading through the output terminal;
- a pulse output device for outputting the accelerating charging signal;
- and
- a voltage detection device for detecting the output voltage, outputting an enabling signal to start the pulse output device when the output voltage is lower than a first voltage, and outputting a disabling signal to turn off the pulse output device when the output voltage is higher than a second voltage.
Dependencies are inferred from the claim text.