Pulse current generation circuit

A pulse current generation circuit comprising:

• a first N-type transistor that is connected at a first signal electrode thereof to an output terminal of an output pulse current, and that functions as a first constant current source according to a bias voltage of a positive polarity;
• a second N-type transistor that is connected to a second signal electrode of the first N-type transistor and ground, and that switches a current of the first constant current source in response to an input pulse of a positive polarity and thus generates the output pulse current;
• a first P-type transistor that is connected at a first signal electrode thereof to the output terminal, and that functions as a second constant current source according to a bias voltage of a negative polarity;
• a second P-type transistor that is connected to a second signal electrode of the first P-type transistor and a power supply, and that switches a current of the second constant current source in response to a first correction pulse of a negative polarity applied thereto at timing of occurrence of an overshoot in the output pulse current and thus generates a first correction pulse current;
• and
• a third N-type transistor that is connected to the second signal electrode of the first N-type transistor and the ground, and that switches a current of the first constant current source in response to a second correction pulse of a positive polarity applied thereto at timing of occurrence of an undershoot in the output pulse current and thus generates a second correction pulse current.

A pulse current generation circuit comprising:

• a first N-type transistor that is connected at a first signal electrode thereof to an output terminal of an output pulse current, and that functions as a first constant current source according to a bias voltage of a positive polarity;
• a second N-type transistor that is connected to a second signal electrode of the first N-type transistor and ground, and that switches a current of the first constant current source in response to an input pulse of a positive polarity and thus generates the output pulse current;
• a P-type transistor that is connected to a power supply and the output terminal, and that conducts a switching operation in response to a first correction pulse of a negative polarity applied thereto at timing of occurrence of an overshoot in the output pulse current and thus generates a first correction pulse current;
• and
• a third N-type transistor that is connected to the output terminal and the ground, and that conducts a switching operation in response to a second correction pulse of a positive polarity applied thereto at timing of occurrence of an undershoot in the output pulse current and thus generates a second correction pulse current.

A pulse current generation circuit comprising:

• a CMOS inverter that inverts an input pulse applied thereto and outputs an inverted pulse;
• a current source;
• a current mirror circuit that supplies an output current of the current source to the CMOS inverter;
• a first N-type transistor that is connected at a first signal electrode thereof to an output terminal of an output pulse current, and that functions as a constant current source according to a bias voltage of a positive polarity;
• a second N-type transistor that is connected to a second signal electrode of the first N-type transistor and ground, and that switches a current of the constant current source in response to an output of the CMOS inverter and thus generates the output pulse current.

A pulse current generation circuit comprising:

• first and second N-type transistors that are each connected at a first signal electrode thereof to an output terminal of an output pulse current, and that function respectively as first and second constant current sources according to a bias voltage of a positive polarity;
• a third N-type transistor that is connected to a second signal electrode of the first N-type transistor and ground, and that switches a current of the first constant current source in response to an input pulse of a positive polarity and thus generates the output pulse current;
• and
• a fourth N-type transistor that is connected to a second signal electrode of the second N-type transistor and the ground, and that conducts a switching operation in response to a correction pulse of a positive polarity provided with a valley portion at timing of occurrence of an overshoot in the output pulse current and with a hill portion at timing of occurrence of an undershoot in the output pulse current, and thus generates a correction pulse current.

A pulse current generation circuit comprising:

• a first N-type transistor that is connected at a first signal electrode thereof to an output terminal of an output pulse current, and that functions as a first constant current source according to a bias voltage of a positive polarity;
• a second N-type transistor that is connected to a second signal electrode of the first N-type transistor and ground, and that switches a current of the first constant current source in response to an input pulse of a positive polarity and thus generates the output pulse current;
• and
• a third N-type transistor that is connected to the output terminal and the ground, and that conducts a switching operation in response to a correction pulse of a positive polarity provided with a valley portion at timing of occurrence of an overshoot in the output pulse current and with a hill portion at timing of occurrence of an undershoot in the output pulse current, and thus generates a correction pulse current.