Motorola Corporation

Knowles Electronics, Inc.

Donald M Yochem

Dale Gerard Schwent

Joshua Watson

Karan Jumani

Christopher O Colvis

Meiling Huang

The present disclosure relates to microphone devices. One microphone assembly includes a transducer and a housing. The microphone assembly includes an integrated circuit coupled to the transducer. The housing includes a port, a base, and a cover. The cover includes an inner wall and an outer wall. The inner wall and outer wall can be coupled to the base. The inner wall and the base are mechanically coupled and define an enclosed volume. The transducer is disposed in the enclosed volume.

RF immune microphone

Microphone devices and methods for manufacturing microphone devices that include a substrate having a first surface and a second surface, a cover secured to the first surface of the substrate to form an enclosed back volume, an application specific integrated circuit (ASIC) embedded between the first surface and the second surface of the substrate, a microelectromechanical systems (MEMS) transducer mounted on the first surface of the substrate, and an inductor mounted on the first surface of the substrate.

Microphone device with inductive filtering

This invention is a method of carrier suppression tuning of a wireless communication device ( ) utilizing a quadrature modulator ( ) in a transmission path (102). A power detector ( ) and a processor ( ) are coupled to the ends of the transmission path ( ) to provide feedback to the quadrature modulator ( ) and, thus, minimizes carrier feedthrough. For this invention, the transmission path ( ) of the device ( ) is enabled and &ldquo;I&rdquo; and &ldquo;Q&rdquo; DC offset values are set to default values. Then, output voltages from the power detector ( ) are sampled and the &ldquo;I&rdquo; DC offset value is adjusted based on the sampled voltages. Similarly, output voltages from the power detector ( ) are sampled and the &ldquo;Q&rdquo; DC offset value is adjusted based on the sampled voltages. These steps of sampling and adjusting for the &ldquo;I&rdquo; and &ldquo;Q&rdquo; DC offset values are repeated until the power detector ( ) produces an output that is less than a predetermined threshold value.

Method for automatic carrier suppression tuning of a wireless communication device

The dual mode amplifier network of the present invention enables a radiotelephone to operate efficiently in both the U.S. Digital Cellular mode and the FM analog cellular mode. Multiple, switched branches (110 and 120) permit one branch (110) with an isolator (103) to be used in the in the U.S. Digital Cellular mode while the other branch (120) is switched out. In the analog mode, the transmit filter branch (120) is used while the isolator branch (110) is switched out.

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Lake Villa, IL, United States of America

Donald M Yochem