Patent ID: 6753798
Filing Date: 2004-06-22
Classification: H02M,Y02B,Y02P

Abstract:
A filter configuration for filtering an analog signal, comprising:an analog-to-digital converter unit having: an input for receiving an analog filter input signal having a magnitude; and an output supplying a pulse signal having a sequence of pulses, a number of said pulses per unit time being dependent on the magnitude of the filter input signal; a counter configuration being connected to said output of said analog-to-digital converter unit and receiving said pulse signal from said analog-to-digital converter unit,, said counter configuration having at least one counter supplying a counter reading having a value; and a digital-to-analog converter unit connected to said counter configuration, said counter configuration supplying said counter reading to said digital-to-analog converter unit in each case once during an evaluation interval and forming an analog filter output signal having an amplitude dependent upon said value of said counter reading; and wherein said pulse signal and said evaluation interval are coordinated with one another to cause said at least one counter to overflow at least once within said evaluation interval.