Input buffer

An input buffer comprising:

• first and second transistors respectively coupled to a first prescribed voltage and a second prescribed voltage, and coupled together by respective second electrodes thereof;
• a third transistor having a control electrode that receives an input signal and a first electrode that receives the second prescribed voltage;
• a fourth transistor having a control electrode coupled to a second electrode of the third transistor and an output signal of the input buffer, and a first electrode that receives the first prescribed voltage;
• and
• a fifth transistor having a second electrode coupled to a second electrode of the fourth transistor and a control electrode of the first transistor, a control electrode that receives a third prescribed voltage, and a first electrode that receives the input signal.

An input buffer comprising:

• first and second transistors respectively coupled to a first prescribed voltage and a second prescribed voltage, and coupled together by second electrodes;
• a third transistor having a control electrode that receives an input signal and a first electrode that receives the second prescribed voltage;
• a fourth transistor having a control electrode coupled to a second electrode of the third transistor and an output signal of the input buffer, and a first electrode that receives the first prescribed voltage;
• a fifth transistor having control and first electrodes that receive the first prescribed voltage;
• a sixth transistor having a control electrode and a first electrode commonly coupled to a second electrode of the fifth transistor;
• and
• a seventh transistor having a control electrode coupled to a second electrode of the sixth transistor, a second electrode commonly coupled to a second electrode of the fourth transistor and the control electrode of the first transistor, and a third electrode that receives the input signal.

An input buffer having pull-up and pull-down transistors commonly coupled by second electrodes between a first prescribed voltage and a second prescribed voltage converts and outputs an input signal, the input buffer comprising:

• a control unit that receives an output signal of the input buffer, wherein the control unit turns off the pull-up transistor when the input signal is a high level, and turns on the pull-up transistor when the input signal is a low level to generate the output signal of the input buffer, wherein the control unit comprises,
• a third transistor having a second electrode coupled to the pull-up transistor, a control electrode that receives a third prescribed voltage, and a first electrode that receives the input signal,
• a first transistor connected between the input signal and the second prescribed voltage, and
• a second transistor connected to the first transistor and the first prescribed voltage, wherein the third transistor has the second electrode coupled to a second electrode of the second transistor and a control electrode of the pull-up transistor, and wherein the third prescribed voltage does not equal the first and second prescribed voltages.

An input buffer having pull-up and pull-down transistors commonly coupled by second electrodes between a first prescribed voltage and a second prescribed voltage converts and outputs an input signal, the input buffer comprising:

• a control unit that receives an output signal of the input buffer, wherein the control unit turns off the pull-up transistor when the input signal is a high level, and turns on the pull-up transistor when the input signal is a low level to generate the output signal of the input buffer, wherein the control unit comprises,
• a first transistor having a control electrode that receives the input signal, a first electrode that receives the second prescribed voltage and a second electrode that receives the output signal of the input buffer,
• a second transistor coupled between the first transistor and the control electrode of the pull-up transistor, and
• a third transistor having a second electrode coupled to the pull-up transistor, control electrode that receives a third prescribed voltage, and a first electrode that receives the input signal, wherein the third transistor has the second electrode coupled to a control electrode of the pull-up transistor, and wherein the third prescribed voltage is between the first and second prescribed voltages.