Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1979-06-21
1982-01-19
Anagnos, Larry N.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307297, 307578, H03K 1714, H03K 1730, H03K 3353
Patent
active
043119239
ABSTRACT:
To regulate the threshold voltage of insulated-gate field-effect transistors (IGFETs) in an integrated circuit, such as that of an electronic wristwatch, capacitors and other IGFETs of the same conductivity type as those of the controlled circuit are incorporated in the substrate thereof to form a regulating transistor, a constant-current generator and one or more voltage multipliers. The current generator and the main electrodes (source and drain) of the regulating transistor, whose gate is tied to its source, are connected in series across a generator of reference voltage constituted by one or more such multipliers. One of the main electrodes of the regulating transistor is connected, directly or through a further voltage multiplier, to the reference terminal (O) of the controlled circuit while still another such multiplier may be inserted between the ouptut of the constant-current generator and the interconnected source and gate electrodes of the regulating transistor. The current generator may comprise a storage capacitor periodically charged through a first IGFET (T.sub.1) in the presence of the leading edge of an applied pulse, such as a half-cycle of a square wave, and discharged through a second IGFET (T.sub.2) on the trailing edge thereof.
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Luscher Jakob
Rusznyak Andreas
Anagnos Larry N.
Ebauches SA
Ross Karl F.
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