Level-shifting transparent window sense amplifier

An apparatus, comprising:

• sense amplifier circuitry configured to receive an input signal at a first voltage level and generate an output signal at a second, different voltage level;
• control circuitry configured to:
• during a time interval subsequent to an active edge of a clock signal, drive the output signal of the sense amplifier circuitry to match the logical value of the input signal, such that upstream circuitry is allowed to time borrow across voltage domains corresponding to the first and second voltage levels;
• and
• maintain a current value of the output signal after expiration of the time interval.

A non-transitory computer readable storage medium having stored thereon design information that specifies a design of at least a portion of a hardware integrated circuit in a format recognized by a semiconductor fabrication system that is configured to use the design information to produce the circuit according to the design, wherein the design information specifies that the circuit includes:

• sense amplifier circuitry configured to receive an input signal at a first voltage level and generate an output signal at a second, different voltage level;
• control circuitry configured to:
• during a time interval subsequent to an active edge of a clock signal, drive the output signal of the sense amplifier circuitry to match the logical value of the input signal, such that upstream circuitry is allowed to time borrow across voltage domains corresponding to the first and second voltage levels;
• and
• maintain a current value of the output signal after expiration of the time interval.