Circuit arrangement for signal mixing
View Patent ↗A circuit arrangement for signal mixing. One embodiment provides a circuit arrangement for mixing an input signal with at least one carrier signal. The circuit arrangement includes a current source and a current sink. The current source and the current sink have a mixer core coupled between them which provides cross-coupling between mixer input connections and mixer output connections.
1. A circuit arrangement comprising:
a current source;
a current sink; and
a mixer core coupled between the current source and the current sink comprising:
mixer input connections for coupling the current sink and the current source; and
mixer output connections; and
carrier signal inputs configured for supplying at least one carrier signal to the mixer core, and
wherein the mixer core provides cross-coupling between the mixer output connections and the mixer input connections on the basis of the at least one carrier signal, and
wherein a first current sink input signal and a second current sink input signal are in the form of a differential signal to be mixed and a first current source input signal and a second current source input signal are input to the current source in the form of a differential signal to be mixed.
2. The circuit arrangement of claim 1 , wherein a mixed signal provided by mixing an input signal with the at least one carrier signal is tapped off between the mixer output connections.
3. The circuit arrangement of claim 1 , comprising first and second current sink input transistors supplied with the first current sink input signal and the second current sink input signal.
4. The circuit arrangement of claim 1 , comprising first and second current source input transistors supplied with the first current source input signal and the second current source input signal.
5. The circuit arrangement of claim 1 , wherein the at least one carrier signal is a differential signal.
6. A circuit arrangement for mixing an input signal with at least one carrier signal, comprising:
a current source, to which the input signal is supplied as a current source input signal and which outputs a signal to be mixed on the basis of the current source input signal;
a current sink, to which the input signal is supplied as a current sink input signal and which receives the signal to be mixed on the basis of the current sink input signal; and
a mixer core which is connected between the current source and the current sink and which has:
mixer input connections for connecting the current sink and the current source; and
mixer output connections;
carrier signal input connections for supplying the at least one carrier signal to the mixer core,
wherein the mixer core provides cross-coupling between the mixer output connections and the mixer input connections on the basis of the at least one carrier signal.
7. The circuit arrangement of claim 6 , wherein a mixed signal provided by mixing the input signal with the at least one carrier signal can be tapped off between the mixer output connections.
8. The circuit arrangement of claim 6 , wherein the current sink input signal comprises a first and a second current sink input signal, and the first current sink input signal and the second current sink input signal are in the form of a differential signal to be mixed.
9. The circuit arrangement of claim 6 , wherein the current source input signal comprises a first and a second current source input signal, and the first current source input signal and the second current source input signal are in the form of a differential signal to be mixed.
10. The circuit arrangement of claim 6 , wherein the carrier signal is in the form of a differential signal.
11. The circuit arrangement of claim 6 , wherein the mixer core is formed from paired parallel-connected transistors with a complementary transfer characteristic.
12. The circuit arrangement of claim 6 , wherein the mixer core is formed with transistors having the same transfer characteristic.
13. The circuit arrangement of claim 6 , wherein the current source has a regulated cascode.
14. The circuit arrangement of claim 6 , wherein the current sink has a regulated cascode.
15. The circuit arrangement of claim 6 , wherein, for at least one element selected from the group consisting of the current source and the current sink, a regulated cascode is formed from first and second regulating transistors which interact with first and second voltage amplifiers in the form of operational amplifiers.
16. The circuit arrangement of claim 6 , wherein the mixer output connections have a load resistor connected to them for transferring the signal to be mixed.
17. A method for mixing an input signal with at least one carrier signal, comprising:
outputting a signal to be mixed from a current source, to which the input signal is supplied as a current source input signal, on the basis of the current source input signal;
inputting the signal to be mixed into mixer input connections of a mixer core connected to the current source;
outputting the signal to be mixed from mixer input connections of the mixer core connected to the current source;
receiving the signal to be mixed using a current sink, connected to the mixer input connections and to which the input signal is supplied as a current sink input signal, on the basis of the current sink input signal; and
supplying the at least one carrier signal to the mixer core, connected between the current source and the current sink, via carrier signal input connections of the mixer core,
wherein the mixer core provides cross-coupling between the mixer output connections and the mixer input connections on the basis of the at least one carrier signal.
18. The method of claim 17 , comprising outputting different signals to be mixed from the current source and receiving the different signals by the current sink connected to the mixer input connections.
19. The method of claim 17 , comprising obtaining a mixed signal by mixing the input signal with the at least one carrier signal between the mixer output connections.
20. The method of claim 17 , comprising inputting the first current sink input signal and the second current sink input signal as a differential signal to be mixed.
21. The method of claim 17 , comprising inputting the first current source input signal and the second current source input signal as a differential signal to be mixed.
22. The method of claim 17 , comprising inputting the at least one carrier signal as a differential signal.
23. The method of claim 17 , wherein the current source has a regulated cascode circuit.
24. The method of claim 17 , wherein the current sink has a regulated cascode circuit.
25. The method of claim 17 , comprising routing the signal to be mixed through a load resistor connected to mixer output connections of the mixer core.