Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1991-11-12
1993-12-21
Sikes, William L.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
3072961, 307264, 307494, 307355, 307350, 307364, H03K 301, H03K 522
Patent
active
052723933
ABSTRACT:
In a voltage converter provided in a semiconductor device and supplying an internal supply voltage to a circuit in the semiconductor device, a circuit is provided for generating a first voltage whose dependency on an external supply voltage is regulated to a predetermined small value, while another circuit is provided for generating a second voltage whose dependency on the external supplying voltage is larger than the dependency of the first voltage. Another circuit selects the first voltage when the semiconductor device is in a state of a standard operation and selects the second voltage when the device is in another state of operation, such as testing or aging. The selected voltage may be converted by a differential amplifier which is constituted by a load of P-channel MOS transistors and a source-coupled pair of N-channel MOS transistors. An output of the differential amplifier is fed back through a directly coupled voltage lowering circuit which generates the converted output.
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Aoki Masakazu
Hori Ryoichi
Horiguchi Masashi
Itoh Kiyoo
Nakagome Yoshinobu
Cunningham Terry D.
Hitachi , Ltd.
Sikes William L.
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