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US 2007/0182462 A1Published application
Output driver capable of controlling a short circuit current
AssigneeSamsung Electronics Co., Ltd.
InventorDong-Jin Lee
Life of this patent
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Abstract
An output driver capable of controlling a short circuit current includes a driving unit and a driving control unit. The driving unit receives a first driving signal and a second driving signal in response to a control signal and generates an output signal. The driving unit control unit includes a driving unit copying unit having the same construction as the driving unit and compares an output copying signal generated from the first and second driving signals by the driving unit copying unit with a reference voltage and generates the control signal that controls delays of the first and second driving signals in a test mode.
Claims30
An output driver comprising:
- a driving unit receiving a first driving signal and a second driving signal and generating an output signal;
- and
- a driving control unit including a driving unit copying unit that is identical to the driving unit, the driving control unit comparing an output copying signal generated from the first driving signal and the second driving signal by the driving unit copying unit with a reference voltage and generating a control signal that controls delays applied to the first and second driving signals in a test mode.
An output driver comprising:
- a driving unit receiving a first driving signal and a second driving signal and generating an output signal in response to the first and second driving signals;
- a driving unit copying unit receiving the first driving signal and the second driving signal and generating an output copying signal and a ground copying signal in response to the first and second driving signals;
- a copying unit precharge unit providing a power supply voltage as the output copying signal;
- a copying unit enable unit providing a ground voltage as the ground copying signal;
- a reference voltage generation unit generating a reference voltage from the power supply voltage and the ground voltage;
- and
- a comparison unit comparing the output copying signal with the reference voltage and generating a control signal that controls delays applied to the first driving signal and the second driving signal fed to the driving unit and the driving copying unit.
4 more elements
An output driver comprising:
- a switching unit transmitting a delay control signal to a first switching terminal or a second switching terminal in response to a control signal;
- a driving unit receiving a first driving signal and a second driving signal in response to the delay control signal received via the first switching terminal or the second switching terminal and generating an output signal in response to the first driving signal and the second driving signal;
- a driving unit copying unit receiving the first driving signal and the second driving signal in response to the delay control signal received via the first switching terminal or the second switching terminal and generating an output copying signal and a ground copying signal in response to the first and second driving signals;
- a copying unit precharge unit providing a power supply voltage as the output copying signal;
- a copying unit enable unit providing a ground voltage as the ground copying signal;
- a reference voltage generation unit generating a reference voltage from the power supply voltage and the ground voltage;
- and
- a comparison unit comparing the output copying signal with the reference voltage and generating the delay control signal.
5 more elements
An output driver comprising:
- a driving unit receiving a first driving signal and a second driving signal in response to a plurality of counter bit signals and generating an output signal based on the first and second driving signals;
- a driving unit copying unit receiving the first driving signal and the second driving signal in response to the counter bit signals and outputting an output copying signal and a ground copying signal;
- a copying unit precharge unit providing a power supply voltage as the output copying signal;
- a copying unit enable unit providing a ground voltage as the ground copying signal;
- a reference voltage generation unit generating a reference voltage from the power supply voltage and the ground voltage;
- a comparison unit comparing the output copying signal with the reference voltage and generating a control signal;
- and
- a counter generating the counter bit signals in response to the control signal, the counter bit signals being up counted or down counted.
5 more elements
An output driver comprising:
- a switching unit transmitting a plurality of counter bit signals to a first switching terminal or a second switching terminal in response to a control signal;
- a driving unit receiving a first driving signal and a second driving signal in response to the counter bit signals received via the first switching terminal or the second switching terminal and generating an output signal based on the first and second driving signals;
- a driving unit copying unit receiving the first and second driving signals in response to the counter bit signals received via the first switching terminal or the second switching terminal and generating an output copying signal and a ground copying signal based on the first and second driving signals;
- a copying unit precharge unit providing a power supply voltage as the output copying signal;
- a copying unit enable unit providing a ground voltage as the ground copying signal;
- a reference voltage generation unit generating a reference voltage from the power supply voltage and the ground voltage;
- a comparison unit comparing the output copying signal with the reference voltage and generating a control signal;
- and
- a counter generating the counter bit signals in response to the control signal, the counter bit signals being up counted or down counted.
6 more elements
Dependencies are inferred from the claim text.