Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1981-03-23
1983-02-15
Munson, Gene M.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
357 23, 357 24, H03K 524, H01L 2978
Patent
active
043743340
ABSTRACT:
A first surface charge transistor and a second surface charge transistor are provided in a common substrate. During a first phase of a cycle of operation a first voltage signal is applied to the transfer gate of the first transistor and a second voltage signal is applied to the transfer gate of the second transistor. During a second phase of the cycle of operation, the first voltage signal is applied to the transfer gate of the second transistor and the second voltage signal is applied to the transfer gate of the first transistor. During the first phase the source region and the transfer gate region of each of the transistors are equilibrated. The receiver regions or nodes of each of the transistors are precharged and then floated or isolated. During the second phase of the cycle, the receiver nodes accumulate an amount of charge proportional to the change of voltage resulting from the switching of the signals. Charge is received, however, only if a transfer gate becomes more positive (for n-channel transistors). The receiver node associated with the more positive signal in the first phase of operation will therefore remain charged while the receiver node associated with the more negative signal will be discharged, by transfer of charge, toward ground. The extent of the potential change is proportional to the difference between the two voltage signals and the gain of the surface charge transistors.
REFERENCES:
patent: 4071775 (1978-01-01), Hewes
patent: 4150304 (1979-04-01), Jensen
patent: 4277702 (1981-07-01), Hamilton et al.
patent: 4291243 (1981-09-01), Hamilton et al.
Davis Jr. James C.
General Electric Company
Munson Gene M.
Snyder Marvin
Zaskalicky Julius J.
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