SIGNAL TRANSMISSION CIRCUIT
First Claim
1. A semiconductor device comprising:
- first and second power supply lines;
a first logical circuit including a first transistor of a first conductive type and a second transistor of a second conductive type, the first and second transistors being connected in series between the first and second power supply lines;
a first source transistor of the first conductive type provided between the first power supply line and the first transistor, the first source transistor being controlled based on a first control signal; and
a first load circuit provided between the second power supply line and the second transistor.
1 Assignment
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Accused Products
Abstract
To provide an inverter including first and second transistors connected in series between first and second power supply lines, a source transistor that is provided between the first power supply line and the first transistor and is conductive based on a control signal, and a load transistor that serves as a load circuit provided between the second power supply line and the second transistor. According to the present invention, because a difference between a load between the first power supply line and the first transistor and a load between the second power supply line and the second transistor is reduced, a difference between a signal propagation rate at which an input signal supplied to the inverter changes from a low level to a high level and a signal propagation rate at which the input signal changes from the high level to the low level is reduced.
8 Citations
12 Claims
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1. A semiconductor device comprising:
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first and second power supply lines; a first logical circuit including a first transistor of a first conductive type and a second transistor of a second conductive type, the first and second transistors being connected in series between the first and second power supply lines; a first source transistor of the first conductive type provided between the first power supply line and the first transistor, the first source transistor being controlled based on a first control signal; and a first load circuit provided between the second power supply line and the second transistor. - View Dependent Claims (2, 3, 4, 5, 6, 9, 10, 11)
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- 7. The semiconductor device as claimed in claim wherein a load amount of the first load circuit is substantially equal to a load amount of the second source transistor in an on state.
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12. A semiconductor device comprising:
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a logical circuit to which an input signal is supplied, a logical level of the input signal changing in an active state and being fixed to one of logical levels in a standby state; a first power supply line that supplies a first operating potential to the logical circuit; a second power supply line that supplies a second operating potential to the logical circuit; a source transistor connected between the logical circuit and the first power supply line, the source transistor being turned on in the active state and turned off in the standby state; and a load transistor connected between the logical circuit and the second power supply line, the load transistor being fixed to an on state in both the active state and the standby state.
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Specification