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A radio receiver system for frequency-modulated signals is described which uses a direct conversion (zero intermediate frequency) technique. The characteristics of the system are developed especially in areas of difference from conventional methods. The realization is shown of the complete receiver in two integrated circuits which form part of a synthesized 30 to 88 MHz equipment. The conclusion is drawn that the combination of direct conversion and large-scale integration is a very powerful means for future development of radio receiver techniques.