Abstract: A modulo arithmetic (61) for generating the addresses for accessing the memory cells of a memory in a DSP (digital signal processor) includes three inputs: an input address (30), an increment (31) and a modulo value (33). The next address (36) is generated based on these inputs as follows. An adder (22) generates a first address (32) by adding the input address (30) and the increment (31) and a second address (34) is generated by subtracting the modulo (33) from the first address (32) by means of the subtractor (23). The comparator (45) checks whether the second address is lower than or equal to zero and if so, the multiplexer (24) outputs the first address at its output (36). If the second address is higher than zero, the multiplexer (24) is controlled such that it outputs the second address (34). A further comparator (63) compares the input address (30) and the modulo (33).

Abstract: ADC circuitry has a first programmable gain amplifier to amplify an analog input, a first analog to digital converter coupled to an output of the first amplifier, a second programmable gain amplifier, to amplify the analog input, a second analog to digital converter coupled to an output of the second amplifier, and a digital circuit for deriving a digital output from the outputs of the first and second converters and a controller for controlling the gains of the first and second amplifiers, according to the outputs of the first and second converters. Such programmable gain pre amplifiers help enable effective dynamic range to be extended without unduly increasing the number of quantisation bits, or the number of components or the power dissipation. It can be used in applications sensitive to size and power, such as DSP based acoustic devices including hearing aids.

Abstract: A method and system for managing physiological systems is provided. The physiological system management (PSM) system includes one or more signal acquisition blocks to collect physiological information. The PSM system includes oversampled filterbanks for transferring one or more input signal related to the physiological information into subband signals, and a subband processing scheme for processing the outputs from the oversampled filterbanks for event detection in one or more physiological systems. The PSM system includes an adaptive controller which decides on the proper control measure and delivers the measure to the one or more physiological systems.