The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A digital hearing-aid chip integrates a pre-fitting verification algorithm to obtain gain fitting in two steps: coarse and fine. The internal ear canal modeling filter circuit enables the coarse fitting based on the shape of the external ear. Fine fitting verification is performed with external inputs. The 3.74mm2 chip draws less than 120muA from a single 0.9V supply in a 0.18mum CMOS technology.
An ultra low-power digital signal processor (DSP) is proposed for the digital hearing aid. The DSP has a SNR monitor to vary its internal clock frequency in accordance with the input signal level. Digital filters use hardwired barrel shifters in place of multipliers, and a parameter ROM provides filter parameters. The clock generator consumes only 1 muW at sub-1V. The DSP consumes only 10 muW at 0...
A full chip implementation of a low-power digital hearing aid is reported. It is composed of preamplifier, Sigma-Delta ADC, DSP and Sigma-Delta DAC with low-power technique. The hardwired DSP has 6 parameters to reduce power consumption with high flexibility. The Sigma-Delta DAC adopts heterogeneous frequency to reduce power consumption further. The proposed digital hearing aid chip achieves 79-dB...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.