Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1991-05-17
1993-01-19
Zazworsky, John
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307355, 307491, 307494, 307572, H03K 1716, H03K 524, G11C 2702
Patent
active
051809303
ABSTRACT:
In a sample and hold circuit comprising a plurality of serially connected comparators wherein each comparator has a feedback switch coupled between an input terminal and an output terminal of the comparator, and wherein data is held on high impedance capacitive nodes, when the series of feedback switches turn off, a capacitor is coupled across a current switching transistor which has a control terminal coupled for receiving a feedback switch control signal. When the feedback switch control signal undergoes a transition, the capacitor causes a voltage to ramp up or down. A current limiting transistor having a control terminal coupled for receiving a delay control signal is coupled in series with the current switching transistor for controlling the rate of current flow through the current switching transistor in accordance with the magnitude of the delay control signal. The voltage at the capacitor is coupled to a compare circuit having an output signal which changes state when the voltage at the capacitor passes a threshold value. This output signal functions as a delayed switching signal for delaying the turnoff of subsequent feedback switches in the series.
REFERENCES:
patent: 4028558 (1977-06-01), Heller et al.
patent: 4075509 (1978-02-01), Redfern
patent: 4523107 (1985-06-01), Peterson
patent: 4899068 (1990-02-01), Klose et al.
National Semiconductor Corp.
Zazworsky John
LandOfFree
Method and apparatus for reducing the effects of feedback switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for reducing the effects of feedback switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for reducing the effects of feedback switch will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-103661