Mark Johnson Email & Phone Number

OTTO is a premium supplier of audio accessories and switches to commercial and government markets.

Motorola is a worldwide leader in the design and manufacturing of high tech communications products for government, industrial, commercial, and consumer markets.Sr. Member of the Technical StaffAdvanced Technology and Strategy 2000-2007Created and adapted emerging and disruptive technologies for integration into commercial, industrial, and government.

Led and coordinated Illinois hardware team and Florida software team to developed high-accuracy tracking systems for security and asset management markets.Invented DSSS detection algorithm to achieve >20db sensitivity and >10x lock time improvementDesigned hyperbolic mapping/plotting application for multilateration diagnosticsCreated 3-dimensional gradient.

Developed high-speed data and digital voice technologies for commercial radio (trunking) markets, later to become the Nextel mobile phone system.Designed and implemented 32-node experimental network and PCMCIA adaptor card for iDEN (Nextel) wireless data prototype

As project architect and technical lead for Envoy RF-enhanced PDA, coordinated efforts between Sony, General Magic, and Motorola to establish a standardized platform with extensibility for market differentiation. Implemented demanding modules of design personally.Achieved 60% size reduction over existing POTS DAA designs using current-source load.

Developed first-generation hardware and software architecture for original iDEN (Nextel) radios/phones.Achieved 98% reduction in standby power and 20db blocking improvement with DSP squelch algorithmImplemented real-time prototype of Abacus delta-sigma A/D in FPGA architectureSpearheaded VHDL adoption initiative, serving on VHDL standards committees

Developed data communications systems and data adaptation systems for Motorola systems and networks.Designed base station and ASIC for first Motorola DSP-based data station and mobile deviceSolved perennial channel polarity issue in data products using patented grey-code error pattern detector

Developed UHF PA and associated systems.Achieved 40% improvement in power detection accuracy using parameterizable Schottky clamping RF detector, adopted by all PAs in product lineAssembled automated test system from scavanged test equipment and computers, later to be developed into primary test system for product group and archetype for similar systems.

Msee, Electrical Engineering

Bsee, Bsce, Electrical Engineering

Activities and Societies: Technic