Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1992-12-03
1995-03-07
Heyman, John S.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
330288, 36523006, 365227, 327 73, 327108, G05F 110
Patent
active
053961161
ABSTRACT:
A semiconductor integrated circuit comprises a semiconductor chip, a power supply terminal provided on the semiconductor chip for receiving a voltage from an external power supply source, an internal circuit provided on the semiconductor chip, a power supply circuit provided on the semiconductor chip for transforming an external power supply voltage received from the power supply terminal for supplying a source voltage resulting from the voltage transformation to the internal circuit, and a control circuit provided on the semiconductor chip for controlling the power supply circuit, wherein the control circuit includes external power supply voltage detecting means and/or temperature detecting means and responds to the signal from the external power supply voltage detecting means and/or the temperature detecting means by changing the power supply voltage to the internal circuit to thereby maintain the operating speed of the internal circuit to be constant.
REFERENCES:
patent: 4412186 (1983-10-01), Nagano
patent: 4591739 (1986-05-01), Nagano
patent: 4942369 (1990-07-01), Nakagawara et al.
patent: 4950976 (1990-08-01), Wagoner
patent: 5021682 (1991-06-01), Hobrecht
patent: 5063540 (1991-11-01), Takahashi
"On-Chip Supply Voltage Conversion System and Its Application to a 4Mb DRAM", Watanabe, Y., Extended Abstracts of the 18th (1986) international) Conference on Solid State Devices and Materials, Aug. 20-22, 1986, pp. 307-310.
Hori Ryoichi
Itoh Kiyoo
Kawahara Takayuki
Kawajiri Yoshiki
Kitsukawa Goro
Heyman John S.
Hitachi , Ltd.
Nu Ton My-Trang
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