Sensing circuit unit for a dynamic circuit
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorTsuguyasu Hatsuda
Life of this patent
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Abstract
In the present invention, there are disposed (i) a P-channel MOSFET for detecting variations of the voltage level of a data line to supply an electric current, and (ii) a current mirror circuit to which an electric current from the P-channel MOSFET is entered as a reference current and of which output current terminal is connected to the data line. When the data line is lowered in voltage level so that an electric current flows from the P-channel MOSFET to the current mirror circuit, an output current of the current mirror circuit flows to the drain of an N-channel MOSFET, so that the data line is electrically discharged. Thus, there is achieved a sensing circuit unit which is suitably used for a dynamic circuit and which can detect, at a high speed, variations of the voltage level of the data line as precharged.
Claims21
A sensing circuit unit for a dynamic circuit for detecting voltage level variations of a data line which is disposed in the dynamic circuit and which is precharged to a predetermined voltage level, said sensing circuit unit comprising:
- an electric current supply means for detecting voltage level variations of said data line, said electric current supply means connected to said data line for supplying an electric current when the voltage level of said data line varies;
- a data line discharging means having as an input said electric current from said electric current supply means and having an output current terminal connected to said data line for electrically discharging said data line according to the presence or absence of an electric current supplied from said electric current supply means;
- whereby the decal line discharging means is operated directly by the electric current of said electric current supply means,
- an inverter circuit having a gate input line connected to said data line;
- and
- a supplied electric current control means, connected to said data line discharging means and an output line of said inverter circuit, for cutting off said electric current supplied from the electric current supply means to the data lane discharging means when a change of the voltage level of an output line of said inverter circuit is determined.
A sensing circuit unit for a dynamic circuit for detecting voltage level variations of a first data line which is disposed in the dynamic circuit and which is precharged to a predetermined voltage level, said sensing circuit unit comprising:
- a second data line to be precharged to a predetermined voltage level simultaneously with said first data line;
- an electric current supply means, connected to said first data line, for supplying an electric current when the voltage level of said first data line varies;
- and
- a data line discharging means having as an input said electric current from said electric current supply means and having an output current terminal connected to said second data line for electrically discharging said second data line according to the presence or absence of an electric current supplied from said electric current supply means.
A sensing circuit unit for a dynamic circuit for detecting voltage level variations of a data line which is disposed in the dynamic circuit and which is precharged to a predetermined voltage level, said sensing circuit unit comprising:
- an electric current supply means, connected to said data line, for supplying an electric current when the voltage level of said data line varies;
- a data line discharging means having as an input said electric current from said electric current supply means and having an output current terminal connected to said data line for electrically discharging said data line according to the presence or absence of an electric current supplied from said electric current supply means;
- an inverter circuit having a gate input line connected to said data line;
- and
- a supplied electric current control means, connected between said electric current supply means and said data line discharging means, for cutting off said electric current supplied from said electric current supply means to said data line discharging means when a change of the voltage level of an output line of said inverter circuit is determined.
A sensing circuit unit for a dynamic circuit for detecting voltage level variations of a data line which is disposed in the dynamic circuit and which is precharged to a predetermined voltage level, said sensing circuit unit comprising:
- an electric current supply means connected to said data line for supplying an electric current when the voltage level of said data line varies;
- a data line discharging means having as an input said electric current from said electric current supply means and having an output current terminal connected to said data line for electrically discharging said data line according to the presence or absence of an electric current supplied from said electric current supply means;
- wherein the data line discharging means has a control line which disables the discharging of the data line when the voltage level of said control line is set to a second preset voltage level, and
- a voltage level setting means connected to said data line discharging means such that, when the data line is precharged, the voltage level of said control line of said data discharging means is set to said second preset voltage level.
A sensing circuit unit for a dynamic circuit for detecting voltage level variations of a data line which is disposed in the dynamic circuit and which is precharged to a predetermined voltage level, said sensing circuit unit comprising:
- an electric current supply means connected to said data line for supplying an electric current when the voltage level of said data line varies;
- and
- a data line discharging means including a current mirror circuit having as an input said electric current from said electric current supply means as a reference current, and having an output current terminal connected to said data line for electrically discharging said data line according to the presence or absence of an electric current supplied from said electric current supply means.
Dependencies are inferred from the claim text.