Implantable transducer devices

US7606621B2 · kind B2 · utility

Assignee

• EBR Systems, Inc. · US

Inventors

• Axel F. Brisken · Fremont, US
• Mark W. Cowan · Fremont, US
• Debra S. Echt · Woodside, US
• Richard E. Riley · Palo Alto, US

Key dates

• Filing date: Dec 21, 2005
• Grant date: Oct 20, 2009
• Expiry date: May 14, 2027

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A61N1/3787
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

Receiver-stimulators comprise a nearly isotropic transducer assembly, demodulator circuitry, and at least two tissue contacting electrodes. Use of near isotropic transducers allows the devices to be implanted with less concern regarding the orientation relative to an acoustic energy source. Transducers or transducer elements having relatively small sizes, typically less than ½ the wavelength of the acoustic source, enhance isotropy. The use of single crystal piezoelectric materials enhance sensitivity.