Eric C. Hannah

Conditional access television sound

A digitally encrypted audio signal may be transmitted with an analog television signal. Access to the analog television video signal may be controlled by using graphics overlay techniques. The use of digital encryption techniques on the audio channel prevents improper interception.

Integrated on-chip energy storage using porous-silicon electrochemical capacitors

Integrated on-chip energy storage is increasingly important in the fields of internet of things, energy harvesting, and wearables with capacitors being ideal for devices requiring higher powers, low voltages, or many thousands of cycles. This work demonstrates electrochemical capacitors fabricated using porous Si nanostructures with very high surface-to-volume ratios and an electrolyte. Stability is achieved through ALD TiN or CVD carbon coatings. The use of Si processing methods creates the potential for on-chip energy storage.