Semiconductor Components Industries, LLC

Daryl Roberts

Barry B Heim

Fredrick Zlotnick

A buffer circuit ( ) receives a selection signal (S ), which selects either a first or second threshold voltage for receiving an input signal (S ) at a logic gate ( ). A switch ( ) and a level-shifter ( ) are used in combination to set a voltage at a node ( ). The first input signal is coupled to the switch. The logic gate is coupled to the node, and the voltage level at the node sets the threshold voltage of the logic gate of the buffer circuit.

Buffer circuit with programmable switching thresholds

In a switching circuit, a first electrical element ( ) is disabled before a second electrical element ( ) is enabled. The switching operation is called break before make and ensures that disabling operation of a first electrical element occurs before enabling operation of a second electrical element. The assurance is in the form of a disable signal being detected from a first electrical element at an input of a first detection circuit ( ). Correspondingly, the detected disable signal of the first electrical element enables operation of the second electrical element. Alternatively, a detected disable from the second electrical element at the input of the second detection circuit ( ) enables operation of the first electrical element.

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Chandler, AZ, United States of America

Daryl Roberts