Patent ID: 9041450
Filing Date: 2015-05-26
Classification: H03K

Abstract:
1. A modified NOR-gate comprising; first, second, third and fourth switch elements, a hold circuit, a clock input terminal, an enable input terminal, an output terminal, a positive supply terminal and a negative supply terminal, each switch element comprising a drain, a source and a gate, and configured to be switched between being in a closed state and being in an open state in response to a control voltage between the gate and the drain or between the gate and the source, the switch elements being connected in series between a positive supply terminal and a negative supply terminal with the drain of the first switch element being connected to the positive supply terminal, the drain of the second switch element being connected to the source of the first switch element, the drain of the third switch element being connected to the source of the second switch element and to the output terminal, the drain of the fourth switch element being connected to the source of the third switch element and the source of the fourth switch element being connected to the negative supply terminal, and wherein the gate of the first switch element being connected to the clock input terminal, the gates of the second, third and fourth switch elements being connected to the enable input terminal, and the first and second switch elements are conventional P-channel field-effect transistors, each of which is in the closed state, when there is a sufficiently large, negative voltage between the gate and the drain, and in the open state otherwise.