Analog processing circuits for a 1.1 V 270 μA mixed-signal hearing aid chip

2003 ◽  
Author(s):  
J.W. Fattaruso ◽  
J.R. Hochschild ◽  
W. Sjursen ◽  
Lieyi Fang ◽  
D.G. Gata ◽  
...  
Keyword(s):  
Hearing Aid ◽  
Mixed Signal ◽  
Analog Processing

scholarly journals A Mixed-Signal Programmable Time-Division Power-On-Reset and Volume Control Circuit for High-Resolution Hearing-Aid SoC Application

2018 ◽  
Vol 2018 ◽  
pp. 1-7
Author(s):  
Chengying Chen ◽  
Liming Chen ◽  
Jun Yang
Keyword(s):  
Low Power ◽  
Control Function ◽  
Hearing Aid ◽  
Sar Adc ◽  
Volume Control ◽  
Cmos Process ◽  
Mixed Signal ◽  
Analog To Digital ◽  
Power Application ◽  
Time Division

A mixed-signal programmable Time-Division Power-On-Reset (TD-POR) circuit based on 8-bit Successive Approximation Analog-to-Digital Converter (SAR ADC) for accurate control in low-power hearing-aid System on Chip (SoC) is presented in this paper. The end-of-converter (EOC) signal of SAR ADC is used as the mode-change signal so that the circuit can detect the battery voltage and volume voltage alternately. And the TD-POR circuit also has brown-out reset (BOR) detection capability. Through digital logic circuit, the POR, BOR threshold, and delay time can be adjusted according to the system requirement. The circuit is implemented in SMIC 0.13 μm 1P8M CMOS process. The measurement results show that, in 1 V power supply, the POR, BOR, and volume control function are accomplished. The detection resolution is the best among previous work. With 120 Hz input signal and 15 kHz clock, the ADC shows that Signal to Noise plus Distortion Ratio (SNDR) is 46.5 dB and Effective Number Of Bits (ENOB) is 7.43 bits. Total circuit power consumption is only 86 μw for low-power application.

A 1.1-V 270-μA mixed-signal hearing aid chip

2002 ◽  
Vol 37 (12) ◽  
pp. 1670-1678 ◽  
Author(s):  
D.G. Gata ◽  
W. Sjursen ◽  
J.R. Hochschild ◽  
J.W. Fattaruso ◽  
L. Fang ◽  
...  
Keyword(s):  
Hearing Aid ◽  
Mixed Signal

A 1V, 1.1mW mixed-signal hearing aid SoC in 0.13μm CMOS process

2016 ◽  
Author(s):  
Chengying Chen ◽  
Liming Chen ◽  
Jun Fan ◽  
Zenghui Yu ◽  
Jun Yang ◽  
...  
Keyword(s):  
Hearing Aid ◽  
Cmos Process ◽  
Mixed Signal

Teachers' Stereotypes of Children Who Wear Hearing Aids

1981 ◽  
Vol 12 (3) ◽  
pp. 139-144 ◽  
Author(s):  
Cletus G. Fisher ◽  
Kenneth Brooks
Keyword(s):  
Elementary School ◽  
School Child ◽  
Hearing Aids ◽  
Hearing Aid ◽  
Social Implications ◽  
Elementary School Child ◽  
Classroom Teachers ◽  
Frequency Of Occurrence ◽  
Service Training

Classroom teachers were asked to list the traits they felt were characteristic of the elementary school child who wears a hearing aid. These listings were evaluated according to the desirability of the traits and were studied regarding frequency of occurrence, desirability, and educational, emotional, and social implications. The results of the groupings are discussed in terms of pre-service and in-service training.

Hearing Aid Gain Usage by Children

1989 ◽  
Vol 20 (2) ◽  
pp. 149-152 ◽  
Author(s):  
Kenneth W. Berger
Keyword(s):  
Hearing Aid ◽  
Appreciable Difference ◽  
Significant Difference ◽  
Clinically Significant

Hearing aid gain usage by two groups of children was examined. No appreciable difference was noted between the groups, nor was there a clinically significant difference between gain usage by these children as compared with a sample of adult hearing aid wearers.

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