Numerically controlled oscillator in particular for a radiofrequency signal receiver

A numerically controlled oscillator for a radio-frequency signal receiver,

• said oscillator forming part of a frequency carrier replica generating loop of a radio-frequency signal receiver,
• said oscillator receiving at one input a clock signal, with a first frequency which clocks operations of the oscillator, and a binary word of several bits,
• the oscillator also providing at one output at least an output signal with a frequency determined as a function of said binary word and the clock signal,
• wherein said oscillator comprises a first accumulation stage, for a first number of most-significant bits of the binary word, and a second accumulation stage for a second number of least-significant bits of said binary word,
• the first accumulation stage being clocked at the first clock frequency to supply the determined frequency output signal, while the second stage is clocked at a second clock frequency N times lower than the first clock frequency, a certain number of output bits or binary signals from the second stage being introduced at an input of the first stage every N cycles of the clock signal at the first frequency, and
• wherein a first input register of the first accumulation stage stores the first most-significant bit number of the binary word which defines a frequency carrier phase offset, wherein a second input register of the second accumulation stage stores the second number of least-significant bits of said binary word, and wherein the first accumulation stage provides at one output over at least two output lines carrier frequency binary signals for a carrier frequency replica generating table as a function of said binary word and the first clock frequency.