Patent ID: 7142070

Claim:
A two-point modulator arrangement, comprising: a modulation input for supplying modulation data; an output for discharging a modulated signal; and a phase locked loop comprising: a phase comparator which comprises a first input, a second input, and an output; a controllable oscillator, which comprises a control input and an output; a loop filter, comprising: an input that is coupled to the output of the phase comparator; an output that is connected to the input of the oscillator; and a further input that is formed at a coupling-in element which is connected to the loop filter and is coupled to the modulation input of the modulator arrangement, the coupling-in element being connected to the loop filter solely between a circuit node of the loop filter and a reference potential terminal and being in the form of a high-pass coupling-in point of the two-point modulator, wherein the coupling-in element comprising a parallel circuit including a capacitor and a first series circuit having a second capacitor and a resistor, and the coupling-in element is coupled to the loop filter between the circuit node and the reference potential terminal; a capacitance that is connected to the circuit node of the loop filter, a second series circuit connected in parallel with the capacitance to the circuit node, the second series circuit comprising a resistor and a capacitance; an RC low-pass filter element connected to the circuit node; and a frequency divider arranged in a feedback path of the phase locked loop, said frequency divider having an input that is connected to the output of the oscillator, an output that is connected to the first input of the phase comparator, and a control input for setting the divider ratio that is coupled to the modulation input of the modulator arrangement.