An analog record, playback, and processing system on a chip for mobile communications devices

Author

Jackson, Geoffrey B. ; Awsare, Saleel V. ; Engh, Lawrence D. ; Holzmann, Peter ; Kao, Oliver C. ; Palmer, Carl R. ; Raina, Aditya ; Liu, Chun-Mai ; Kordesch, Albert V.

Author_Institution

Information Storage Devices, San Jose, CA, USA

Volume

35

Issue

3

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

446

Lastpage

449

Abstract

We present a low-power chip for nonvolatile storage and conditioning of voiceband analog audio signals and nonvolatile storage for use in mobile communication devices. The system allows for direct interface to acoustic transducer elements and provides signal conditioning to gain adjust, multiples, filter, and mix two independent signals. The system can record these processed signals as analog samples in a nonvolatile flash EEPROM array for later retrieval. Together with an integrated signal path, the system can store up to 8 minutes of audio signal. Control of the system is achieved via a serial interface, which is used to configure and control the device. All necessary components of the system are provided on chip including analog processing elements, nonvolatile storage, high voltage, and reference generation.

Keywords

analogue processing circuits; flash memories; low-power electronics; mobile communication; acoustic transducer; analog signal processing; flash EEPROM array; low-power chip; mobile communications device; nonvolatile storage; playback mode; record mode; serial interface; system-on-a-chip; voiceband audio signal conditioning; Acoustic transducers; Communication system control; Control systems; Driver circuits; EPROM; Energy consumption; Microphone arrays; Mobile communication; Signal processing; System-on-a-chip;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.826828

Filename

826828