Sigma-delta modulator having a clocked delay line
View Patent ↗A sigma-delta modulator is provided with a filter for noise shaping, with the filter having at least one delay line (DL). The delay line (DL) is a clocked line.
1. A sigma-delta modulator comprising
a plurality of components operating in a time continuous manner,
a filter for noise shaping, wherein the filter comprises a component operating in a time continuous manner and at least one clocked delay line, wherein the plurality of components and the filter form a cascaded converter and the delay line is a continuous-amplitude line.
2. The sigma-delta modulator according to claim 1 , wherein the modulator comprises a clocked comparator and is designed in such a manner that the delay line(s) is/are clocked at the comparator clock rate of the sigma-delta modulator.
3. The sigma-delta modulator according to claim 1 , wherein the modulator comprises a clocked comparator and is designed in such a manner that the delay line(s) is/are clocked at a clock rate which is higher than the comparator clock rate.
4. The sigma-delta modulator according to claim 1 , wherein the modulator has at least one operational amplifier which is operated in a time-continuous manner and is connected in series with the at least one delay line.
5. The sigma-delta modulator according to claim 4 , wherein the modulator has two delay lines and two operational amplifiers in a resonator loop.
6. The sigma-delta modulator according to claim 1 , wherein the delay line(s) is/are integrated by means of Bucket Brigade Devices (BBD) and/or Charge Coupled Devices (CCD).
7. A sigma-delta modulator comprising
a plurality of components operating in a time continuous manner,
a filter for noise shaping comprising at least one clocked delay line,
and a clocked comparator, wherein the delay line is a continuous-amplitude line and the comparator and the delay line are clocked with a common clock signal.
8. The sigma-delta modulator according to claim 7 , wherein the modulator has at least one operational amplifier which is operated in a time-continuous manner and is connected in series with the at least one delay line.
9. The sigma-delta modulator according to claim 8 , wherein the modulator has two delay lines and two operational amplifiers in a resonator loop.
10. The sigma-delta modulator according to claim 7 , wherein the modulator is in the form of a cascaded converter.
11. The sigma-delta modulator according to claim 7 , wherein the delay line(s) is/are integrated by means of Bucket Brigade Devices (BBD) and/or Charge Coupled Devices (CCD).
12. A sigma-delta modulator comprising:
a clocked comparator clocked by a first clock signal, and
a plurality of components operating in a time continuous manner,
a filter for noise shaping, wherein the filter comprises at least one delay line, and wherein the delay line is a clocked line clocked by a second clock signal which is higher than the first clock signal.
13. The sigma-delta modulator according to claim 12 , wherein the modulator has two delay lines and the plurality of components comprise two operational amplifiers.
14. The sigma-delta modulator according to claim 12 , wherein the modulator is in the form of a cascaded converter.
15. The sigma-delta modulator according to claim 12 , wherein the delay line(s) is/are integrated by means of Bucket Brigade Devices (BBD) and/or Charge Coupled Devices (CCD).
16. A sigma-delta modulator comprising
a plurality of components operating in a time continuous manner,
a filter for noise shaping, wherein the filter comprises a component operating in a time continuous manner and at least one clocked delay line, wherein the plurality of components and the filter form a cascaded converter,
wherein the modulator comprises a clocked comparator and is designed in such a manner that the delay line(s) is/are clocked at a clock rate which is higher than the comparator clock rate.
17. The sigma-delta modulator according to claim 16 , wherein the modulator has at least one operational amplifier which is operated in a time-continuous manner and is connected in series with the at least one delay line.
18. The sigma-delta modulator according to claim 17 , wherein the modulator has two delay lines and two operational amplifiers in a resonator loop.
19. The sigma-delta modulator according to claim 16 , wherein the delay line(s) is/are integrated by means of Bucket Brigade Devices (BBD) and/or Charge Coupled Devices (CCD).
20. The sigma-delta modulator according to claim 16 , wherein the delay line is a continuous-amplitude line.