is presented with the first limited mixer signal mb1 and whose output passes through the inverter i3 to the output of the first shift register cell z1 and is fed to the input of the second shift register cell z2 the output signal sz1 is applied directly to the j input of the jk flip flop j2 and through the inverter i4 to the k input the q output of the jk flip flop j2 is the output of the second shift register cell z2 which delivers the signal sz2 the clock inputs of the two jk flip flops j1 and j2 are supplied with the system clock c1 fig1 shows a further embodiment of the color television receiver circuit for carrying out the frequency conversion in accordance with the invention this circuit is identical with the circuit of fig5 with the exception of the following differences the beat comparator sv has been replaced by the beat correction circuit sk to which the first limited mixer signal mb1 the offset signal os the reference signal bz and the frequency difference signal df are applied the two latter signals will be explained later the reference signal bz has a frequency similar to that of the reference signal vb but instead of being locking in frequency and phase to the color burst it is locked to a different frequency of the television standard this may be for example the horizontal frequency or a multiple thereof which is used as a system clock synchronized with the picture the frequency difference signal df is formed by applying the reference signal bz and the reference signal vb to the two inputs of the frequency difference stage.