Title :
Analog processing circuits for a 1.1 V 270 /spl mu/A mixed-signal hearing aid chip
Author :
Fattaruso, J.W. ; Hochschild, J.R. ; Sjursen, W. ; Lieyi Fang ; Gata, D.G. ; Branch, C.M. ; Holmes, J. ; Zhongnong Jiang ; Shuyou Chen ; Kuok Ling ; Petilli, E. ; Skorcz, M.L. ; Dickerson, R.R. ; Severin, W.A.
Author_Institution :
Texas Instrum. Inc., Dallas, TX, USA
Abstract :
A compressing preamplifier, ADC, DAC, output driver and clock oscillator are implemented in a mixed-signal BiCMOS hearing-aid chip with digital filtering. 2.8 /spl mu/V input noise floor over the audio band and 0.02 % THD are achieved with 270 /spl mu/A total battery current.
Keywords :
BiCMOS integrated circuits; analogue processing circuits; analogue-digital conversion; audio signal processing; audio-frequency amplifiers; digital filters; digital-analogue conversion; driver circuits; harmonic distortion; harmonic generation; hearing aids; mixed analogue-digital integrated circuits; preamplifiers; radiofrequency oscillators; 1.1 V; 270 muA; ADC; DAC; THD; analog processing circuits; audio band; battery current; clock oscillator; compressing preamplifiers; digital filtering; input noise floor; mixed-signal BiCMOS hearing-aid chip; output driver; total harmonic distortion; Analog processing circuits; Batteries; BiCMOS integrated circuits; Circuit noise; Clocks; Digital filters; Driver circuits; Filtering; Oscillators; Preamplifiers;
Conference_Titel :
Solid-State Circuits Conference, 2002. Digest of Technical Papers. ISSCC. 2002 IEEE International
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-7335-9
DOI :
10.1109/ISSCC.2002.993093
