Semiconductor integrated circuit device and wireless communication system
First Claim
1. A semiconductor integrated circuit device, comprising:
- a receiving block;
a transmitting block; and
a first power supply unit that supplies a power supply voltage to the receiving block and the transmitting block, respectively, wherein the first power supply unit includes a load element control unit that makes load resistance of the first power supply unit to be higher than the time when the receiving block and the transmitting block are operating normally, in idle mode in which functions of the receiving block and the transmitting block are inactive.
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Accused Products
Abstract
The present invention supplies a stable power supply voltage from small output currents to large output currents, regardless of operation states of a semiconductor integrated circuit device. When an output current of the regulator is small (idle mode), all switches go off. Thereby, power is supplied to a transistor via resistors, a load of a transistor becomes large, and current consumption of the regulator can be reduced. Since a transistor goes off, parasitic capacitance can be reduced, and a sufficient phase margin can be ensured between output of a differential voltage comparator and an output signal of the regulator. In normal operation, all the switches go on, load resistance is reduced to reduce noise, and driving capability is improved to supply stable power supply voltages.
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Citations
12 Claims
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1. A semiconductor integrated circuit device, comprising:
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a receiving block;
a transmitting block; and
a first power supply unit that supplies a power supply voltage to the receiving block and the transmitting block, respectively, wherein the first power supply unit includes a load element control unit that makes load resistance of the first power supply unit to be higher than the time when the receiving block and the transmitting block are operating normally, in idle mode in which functions of the receiving block and the transmitting block are inactive. - View Dependent Claims (2, 3, 4, 6)
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5. A semiconductor integrated circuit device, comprising:
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an oscillator block comprising circuits common to a receiving block and a transmitting block; and
a second power supply unit that supplies a power supply voltage to the oscillator block, wherein the second power supply unit includes a load element control unit that makes load resistance of the second power supply unit higher than the time when the receiving block and the transmitting block are operating normally, in idle mode in which functions of the receiving block and the transmitting block are inactive.
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7. A wireless communication system including a semiconductor integrated circuit device for radio frequency processing that demodulates a receive signal and modulates a transmission signal,
wherein the semiconductor integrated circuit device comprises: -
a receiving block;
a transmitting block; and
a first power supply unit that supplies a power supply voltage to the receiving block and the transmitting block, respectively, wherein the first power supply unit includes a load element control unit that makes load resistance of the first power supply unit higher than the time when the receiving block and the transmitting block are operating normally, in idle mode in which functions of the receiving block and the transmitting block are inactive. - View Dependent Claims (8, 9, 10, 12)
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11. A wireless communication system, comprising:
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an oscillator block comprising circuits common to a receiving block and a transmitting block; and
a second power supply unit that supplies a power supply voltage to the oscillator block, wherein the second power supply unit includes a load element control unit that makes load resistance of the second power supply unit higher than the time when the receiving block and the transmitting block are operating normally, in idle mode in which functions of the receiving block and the transmitting block are inactive.
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Specification