Systems and methods involving transducer signals

1. A system for operating a transducer comprising:

a first node connected to a first transducer;

a first photo-activated switching device having a first source, a first drain connected to the first node, and a first gate operative to receive a first logic signal;

a first terminal connected to the first source;

a second photo-activated switching device having a second source connected to the first node, a second drain, and a second gate operative to receive a second logic signal; and

a second terminal connected to the second drain.

2. The system of claim 1 , wherein the system further comprises:

a third photo-activated switching device having a third source connected to the first node, a third drain, and a third gate operative to receive a third logic signal; and

an output node connected to the third drain.

3. The system of claim 1 , wherein the first terminal is operative to drive the first transducer.

4. The system of claim 1 , wherein the second terminal is operative to drive the first transducer.

5. The system of claim 1 , wherein the first gate is connected to an output terminal of a processor.

6. The system of claim 1 , wherein the second gate is connected to an output terminal of a processor.

7. The system of claim 2 , wherein the third gate is connected to an output terminal of a processor.

8. The system of claim 2 , wherein the output node is connected to an input of a signal conditioning circuit.

9. The system of claim 8 , wherein the signal conditioning circuit is connected to a processor.

10. The system of claim 2 , wherein the output node is connected to an input of a processor.

11. The system of claim 1 , wherein the second terminal is a ground terminal.

12. A transducer signal control circuit comprising:

a first node connected to a first transducer;

a first photo-activated switching device having a first source, a first drain connected to the first node, and a first gate operative to receive a first logic signal;

a first terminal connected to the first source;

a second photo-activated switching device having a second source connected to the first node, a second drain, and a second gate operative to receive a second logic signal; and

a second terminal connected to the second drain.

13. The circuit of claim 12 , wherein the circuit further comprises:

a second node connected to a second transducer;

a third photo-activated switching device having a third source, a third drain connected to the second node, and a third gate operative to receive a third logic signal;

a third terminal connected to the third source;

a fourth photo-activated switching device having a fourth source connected to the second node, a fourth drain, and a fourth gate operative to receive a fourth logic signal; and

a fourth terminal connected to the fourth drain.

14. The circuit of claim 12 , wherein the circuit further comprises:

an output node; and

a fifth photo-activated switching device having a fifth source connected to the first node, a fifth drain connected to the output node, and a fifth gate operative to receive a fifth logic signal.

15. The circuit of claim 13 , wherein the circuit further comprises a sixth photo-activated switching device having a sixth source connected to the second node, a sixth drain connected to the output node, and a sixth gate operative to receive a sixth logic signal.

16. The circuit of claim 12 , wherein the first terminal is operative to drive the first transducer.

17. The circuit of claim 12 , wherein the second terminal is operative to drive the first transducer.

18. The circuit of claim 12 , wherein the first gate is connected to an output terminal of a processor.

19. The circuit of claim 12 , wherein the second gate is connected to an output terminal of a processor.