Analog circuits for a single-chip infrared controlled hearing aid |
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| Authors: | Albert C. Van Der Woerd |
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| Affiliation: | (1) Department of Electrical Engineering, Electronics Research Laboratory, Delft University of Technology, Mekelweg 4, 2628 CD Delft, The Netherlands |
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| Abstract: | All analog circuits for a remotely controllable subminiature hearing aid are presented. It is feasible to integrate all circuits together with an I2L decoder on a single bipolar chip. The volume level and the cutoff frequency of a high-pass filter can be controlled. Besides, the device can be remotely switched at microphone and telephone coil, and switched into a standby mode. All circuits presented have been tested with a semicustom realization. |
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