Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1990-08-29
1992-07-14
LaRoche, Eugene R.
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307353, 307491, 307572, 307246, H03K 5159, G06G 712
Patent
active
051305712
ABSTRACT:
A switched capacitor circuit that uses more than one switch in parallel. The control signals of each switch are turned off in sequence, giving an induced offset voltage in the final case due only to the last turned off switch, but with a capacitor charge or acquisition time due to the parallel combinations of all of the switches. An alternative switch capacitor circuit uses a bootstrapped gatedrive control signal. The gatedrive control signal initially assumes a high value resulting in a low switch resistance and, thus, a fast capacitor charge or acquisition time followed by a reduction in voltage to the normal "digital" level until turn off. The resultant induced offset voltage is the same as that due to a simple minimum sized switch.
REFERENCES:
patent: 4308468 (1981-12-01), Olson
LaRoche Eugene R.
Shingleton Michael B.
Ventritex
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