Zero force mouse

• https://hal.archives-ouvertes.fr/hal-01055457/document
• http://cimar.mae.ufl.edu/CIMAR/pages/pubs/SPIE_paper_2003.pdf
• http://link.springer.com/article/10.1007/s00170-011-3827-z
• http://glaser.berkeley.edu/glaserdrupal/pdf/SPIE%2010.pdf

Patends

• Input device with reduced friction US 8188974 B2 LOGITECH

Dither

• http://info.hydraforce.com/hydraforceinsiderblog/bid/39954/5-Things-to-Consider-When-Applying-Proportional-Valves

Piezoelectric motor

• https://en.wikipedia.org/wiki/Piezoelectric_motor

Piezoelectric speaker drivers

• LM48560 High Voltage Class H Ceramic Speaker Driver with Automatic Level Control
• LM358 and Transformer
• Specialized Circuit Drives 150-V Piezoelectric Motor Using Low-Voltage Op Amp
• Methods to Improve Piezo Dynamics, Accuracy and Linearity: Preshaping / DDL / APC
• OPA454 High Voltage (100V), High-Current (50mA) Operational Amplifiers, G=1 Stable
• DRV2700EVM-HV500 High Voltage Piezo Driver Evaluation Kit
• 1-kV Piezo Amplifier Keeps Cost, Noise Low