Representation, methods, and circuits for time‐based conversion and computation

Abstract

SUMMARYIn this paper, we present an efficient representation of the analog signal using the inter-pulse interval (IPI) time. Based on this representation, methods and circuits for conversion and computation have been developed. To validate these methods and circuits, a test chip has been fabricated using a 0.35 m mixedsignal CMOS process. Together, the circuits occupy 59.52×10 −3 mm 2 of chip area and consume 8.8 mW of power from a 3.2 V supply. Test results at 10 MHz and simulations results at 100 MHz show good accuracy over ±600 mV range.

A Time-Mode Translinear Principle for Nonlinear Analog Computation

“…One example of a TM multiplier and divider circuit has been proposed, but it requires transconductance amplifiers as computational units and, thus, introduces the same limitations experienced in voltage and current mode designs [22]. In [23] we introduced a time-mode translinear principle to achieve a nonlinearity directly in time by exploiting the exponential relationship between voltage and time, just as the traditional translinear principle exploits this relationship between current and voltage.…”