High voltage monolithic MOS driver arrays

This paper describes a unique self-scanned monolithic array of high voltage MOS transistors which control the piezoelectric stimulators in the Optacon tactile display developed at Stanford. This monolithic circuit performs both information processing (addressing and storage) and driving of 12 piezoelectric transducers. It contains a 12-bit dynamic shift register, a dynamic capacitor memory and 12 high voltage MOS driver transistors. The circuit has several unique requirements: 1. Low power operation (≈ 2mW). 2. Very low pn junction leakage ( 50%). This high voltage transducer drive circuit represents a unique example of the interaction between system requirements and monolithic device technology in achieving optimum system design.