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Semiconductor integrated circuit device

A technology of integrated circuits and semiconductors, applied in the field of coordinated control of multiple power supply voltages, can solve problems such as withstand voltage degradation, system mode transition time influence, lock-up, etc., and achieve the effect of inhibiting lock-up

Inactive Publication Date: 2009-10-07
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] There is a problem that when controlling the desired board voltage corresponding to the power lock after power control, if the transition time to the desired board voltage becomes longer, it will affect the mode transition time of the system
Furthermore, if power supply control and board control are attempted regardless of the respective voltages, there is a problem of occurrence of lock-up or degradation of withstand voltage due to exceeding the withstand voltage of the transistor.

Method used

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  • Semiconductor integrated circuit device
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no. 1 approach

[0032] figure 1 The configuration of the semiconductor integrated circuit device according to the first embodiment of the present invention is shown. Such as figure 1 As shown, the semiconductor integrated circuit device according to this embodiment includes a substrate control circuit 1 , a power supply control circuit 2 , a special substrate control circuit 3 , a controlled circuit 4 , and a system control circuit 23 . The controlled circuit 4 is composed of a P-channel transistor 5 and an N-channel transistor 6 . The power control circuit 2 receives a power control signal 17 and outputs an internal power supply voltage VDD. The system control circuit 23 inputs VDD, and outputs the special substrate control signal 11 and the substrate control signal 16 . The substrate control circuit 1 receives a substrate control signal 16 and outputs a substrate control output 8 for a P-channel transistor and a substrate control output 7 for an N-channel transistor. The special substra...

no. 2 approach

[0044] Figure 4 The configuration of the semiconductor integrated circuit device according to the second embodiment of the present invention is shown. Figure 4 semiconductor integrated circuit devices in figure 1 In addition to the above configuration, an information storage device 61 is provided. In this information storage device 61, a data table of a lock-up suppression condition table or a data table of a withstand voltage degradation suppression condition table described later is stored. Furthermore, information 62 output from the information storage device 61 is input to the system control circuit 23 , and the system control circuit 23 operates based on the information 62 . The information storage device 61 is constituted by a circuit capable of holding data, such as a volatile or nonvolatile memory.

[0045] Figure 5 express Figure 4 An example of the lockup suppression condition table stored in the information storage device 61 in FIG. Here, use Figure 5 Th...

no. 3 approach

[0065] Figure 12 The configuration of the semiconductor integrated circuit device according to the third embodiment of the present invention is shown. Figure 12 In the semiconductor integrated circuit device, when N is set as an integer equal to or greater than 2, the potential difference control circuit 131 is used to realize cooperative control of the first power supply voltage VDD1, the second power supply voltage VDD2, ..., the Nth power supply voltage VDDN, so that The potential difference between N power supply blocks is kept constant.

[0066] Figure 13 show Figure 12 A detailed configuration example of the potential difference control circuit 131 in FIG. Such as Figure 13 As shown, the non-inverting input V+ of the operational amplifier 158 is respectively connected to VDD1 , VDD2 , . Furthermore, the inverting input V- of the operational amplifier 158 is short-circuited with the output of the operational amplifier 158, and its output is connected to VDD1, VD...

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Abstract

The invention provides a semiconductor integrated circuit device which is provided with a power supply control circuit (2) controlling power supply voltage provided by a controlled circuit (4) consisting of transistors (5, 6), a substrate control circuit (1) controlling substrate voltage of the transistors (5, 6), and a special substrate control circuit (3) controlling the substrate voltage in power supply change from other systems. The special substrate control circuit (3) actively implements the substrate control during the power supply change and controls the expected substrate voltage in advance, thereby shortening the time moving to the expected substrate voltage. Moreover, in order to inhibit the deadlocking and withstand voltage deterioration, the special substrate control circuit (3) implements voltage supply and current supply corresponding to a potential difference condition between the power supply voltage and the substrate voltage.

Description

technical field [0001] The present invention relates to the control of the power supply voltage and the substrate voltage supplied to the transistor, and also relates to the cooperative control of a plurality of power supply voltages. Background technique [0002] In recent years, in order to further reduce power consumption and speed up semiconductor integrated circuit devices, control of power supply voltage and substrate voltage has been carried out. However, when power supply control and substrate control are performed, if the respective voltages are controlled independently of each other, latch-up may occur or breakdown voltage degradation due to exceeding the breakdown voltage of the transistor may occur. Therefore, conventionally, there is a method in which board control is not performed at the time of power transition, and board control is performed after power transition (refer to Patent Document 1). [0003] [Patent Document 1] Japanese Patent Laid-Open No. 2000-1...

Claims

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Application Information

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IPC IPC(8): H03K19/003H03K17/22
Inventor 荒木裕太
Owner PANASONIC CORP
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