Technology Blog

What does a CTO do?

What does a CTO do?

My most popular essay is this one on What Does a CTO do? The CTO is the Chief Technology Officer.

Multi-port Memory Invention

Multi-port Memory Invention

New kind of multiport memory. It exploits the fact that we store words rather than just bits in memories. By storing the words in clever ways one can tolerate collisions among accesses to the memory and still guarantee perfectly correct results. Prof. Ron Rivest of M.I.T. helped me with the concepts

A linear circuit theory conservation theorem

A linear circuit theory conservation theorem

The theoretical work of which I am most proud was on a linear circuit theory conservation theorem that produced tight bounds on the performance of circuits composed of linear elements. The basic paper using the numerical range was titled “Frequency limitations in circuits composed of linear devices.” I followed it by some work that built on that foundation, including “The stability and passivity of MOSFET device models that use nonreciprocal capacitive elements.” Prof. John Wyatt of M.I.T. was my coach and mentor for this whole set of activities.

The first modelocked semiconductor laser diodes

The first modelocked semiconductor laser diodes

I was a member of the team that demonstrated the first modelocked semiconductor laser. We did it first with GaAlAs and then with GaInAsP. These experiments generated pulses more than an order of magnitude shorter than anything previously achieved.