High speed analog-to-digital converter and digital-to-analog converter

Abstract From the Canadian patent

An high speed analog-to-digital converter for converting an analog input , signal (u(t)) with a maximum frequency (F max) to a digital output signal (x(n)) with an output, sampling rate (F~) at least double the maximum frequency (F max) comprises a , plurality, of analog narrowband filters (Fo F M-1) for filtering the analog input signal (u(t)) to, produce a corresponding plurality of narrowband signals (X0-X M-1). Each narrowband, filter has a passband. The sum of the gains of the narrowband filters at any frequency, within an operating frequency band of the plurality of narrowband filters is substantially, unity. Each of a corresponding plurality of analog-to-digital converter units …