USA As Represented by Secretary of the Navy

California Institute of Technology

Greg Levanas

Stephen Christopher Terry

Mohammad Mehdi Mojarradi

Benjamin J Blalock

Eric Rossland

Mark Fratta

Yuan Chen

Raymond S Cozy

Robert Greenwell

A compact resolver pre-amplification assembly has first and second printed circuit boards. The boards include an interface with an N/N&#x2212;1 resolver and a resolver-to-digital converter and three signal paths. The first and second circuit boards are contained in a single package configured for mounting on a robotic joint while providing high amplification and noise rejection. Low level sensitive signal are separated from high level excite signals by locating sensitive signals on the first board and excite signals on the second board.

Compact resolver pre-amplification assembly (RPA) module

The present invention relates to a reference current circuit. The reference circuit comprises a low-level current bias circuit, a voltage proportional-to-absolute temperature generator for creating a proportional-to-absolute temperature voltage (VPTAT), and a MOSFET-based constant-IC regulator circuit. The MOSFET-based constant-IC regulator circuit includes a constant-IC input and constant-IC output. The constant-IC input is electrically connected with the VPTAT generator such that the voltage proportional-to-absolute temperature is the input into the constant-IC regulator circuit. Thus the constant-IC output maintains the constant-IC ratio across any temperature range.

Wide-temperature integrated operational amplifier

Growing community of inventors

Costa Mesa, CA, United States of America

Greg Levanas