Title:
SEMICONDUCTOR DEVICE
Document Type and Number:
Japanese Patent JP3718512
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a CMOS circuit which stably operates at a high speed and/or low power consumption, a CMOS LSI chip composed of the CMOS circuit and a semiconductor device, which prevent latching up caused by power on/off of the CMOS circuit containing a MOSFET of a low threshold voltage or reduce sub-threshold current during the normal operation, in relation to a method for controlling the voltage of a transistor substrate (or well).
SOLUTION: This semiconductor device (1) controls the CMOS circuit well voltage when power is turned on, during the normal operation, and power is turned off. (2) It comprises a first and a second power supply voltages. A circuit including a voltage conversion circuit which is operated by the first power supply voltage generates a third power supply voltage. This voltage is applied to the well of the CMOS circuit composed of a MOSFET which cannot be practically cut off to the full during normal operation, as a well voltage so that the MOSFET can be cut off. After that, the second power supply voltage is applied to the CMOS circuit. (3) The semiconductor device has a circuit which fixes a well potential of the CMOS circuit including the MOSFET which cannot be practically cut off during normal operation. It also has a circuit which changes the MOSFET well potential by means of a capacitive coupling, according to changes of an input signal of the CMOS circuit.
Inventors:
Kiyoshi Ito
Hiroyuki Mizuno
Hiroyuki Mizuno
Application Number:
JP2003364042A
Publication Date:
November 24, 2005
Filing Date:
October 24, 2003
Export Citation:
Assignee:
Renesas Technology Corp.
International Classes:
H01L27/04; G11C11/407; G11C11/408; H01L21/822; H01L21/8238; H01L21/8242; H01L21/8244; H01L27/092; H01L27/10; H01L27/108; H01L27/11; H03K19/094; (IPC1-7): H03K19/094; H01L21/822; H01L21/8238; H01L21/8242; H01L21/8244; H01L27/04; H01L27/092; H01L27/10; H01L27/108; H01L27/11
Domestic Patent References:
| JP8017183A | ||||
| JP6177335A | ||||
| JP5108194A | ||||
| JP10011989A | ||||
| JP5067963A |
Attorney, Agent or Firm:
Shizuyo Tamamura
Yasuo Sakuta
Yasuo Sakuta