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US 7,923,982 B2Granted
Semiconductor integrated circuit
AssigneePanasonic Corporation
InventorMasaya Sumita
Life of this patent
Estimating the term…
Abstract
A semiconductor integrated circuit is provided with a voltage level detector which detects a voltage level of a signal wire, and a transition time detector which detects a time length of a transition period during which the signal wire changes from an inactive voltage state to an active voltage state based on the voltage level detected by the voltage level detector. The voltage level detector detects the voltage level of the signal wire during the transition period.
Claims54
A semiconductor integrated circuit comprising:
- a signal wire;
- and
- a voltage level detector for detecting a voltage level of the signal wire,
- wherein:
- the voltage level detector detects the voltage level of the signal wire during a transition period during which the signal wire changes from an inactive voltage state to an active voltage state based on the voltage level detected by the voltage detector,
- the voltage level detector comprises at least a first NMOS transistor and a first PMOS transistor,
- the signal wire is connected to a gate of the first NMOS transistor, a first voltage is connected to a source of the first NMOS transistor, a drain of the first NMOS transistor is connected to a drain of the first PMOS transistor, a clock is inputted to a gate of the first PMOS transistor, a second voltage is connected to a source of the first PMOS transistor,
- a voltage larger than the first voltage is set to the drain of the first NMOS transistor prior to the transition period during which the signal wire changes from the inactive voltage state to the active voltage state, and
- the voltage level detector detects the drain voltage of the first NMOS transistor during the transition period.
6 more elements
A semiconductor integrated circuit comprising:
- a signal wire;
- a voltage level detector for detecting a voltage level of the signal wire;
- and
- a transition time detector for detecting a time length of a transition period during which the signal wire changes from an inactive voltage state to an active voltage state based on the voltage level detected by the voltage detector, wherein:
- the voltage level detector detects the voltage level of the signal wire during the transition period,
- the voltage level detector comprises differential circuits,
- each of the differential circuits compares a voltage difference between the voltage level of the signal wire and a reference voltage value,
- a clock is inputted to each of the differential circuits,
- different delay values are set in each clock inputted to the differential circuits, and
- different voltage values are set in each reference voltage of the differential circuits.
7 more elements
Dependencies are inferred from the claim text.