One bit high speed signal processing system utilizing controlled spectrum of quantization noise

A 1-bit high speed analog-to-digital and digital-to-analog conversion system for improved digital-to-analog conversion at higher speed and over a wider frequency range comparable to relatively lower speed and narrower frequency range conversion systems, said system comprising:

• input circuit means for receiving an analog input signal;
• analog-to-digital conversion means for quantizing said analog input signal using a controlled spectrum of quantizing noise to produce a 1-bit high speed digital signal so that quantization noise of said 1-bit high speed digital signal is concentrated at a high frequency band, the frequency of the high frequency band being higher than the frequency band of said analog input signal;
• and
• digital-to-analog conversion means for receiving and band-limiting said 1-bit high speed digital signal to produce an analog output signal of a form substantially similar to the form of the analog input signal, wherein said analog-to-digital conversion means comprises:
• an integration circuit, comprising a plurality of cascaded integrators, for integrating the analog input signal,
• a 1-bit quantizer connected to the integration circuit for quantizing the output signal of the integration circuit, and
• a delay circuit for delaying the output signal of the 1-bit quantizer and supplying the delayed signal to the integration circuit.