LT1223 Lateral-MOSFET Amplifier

March 2025
StatusCompleted
Circuit familyAlexander-style / lateral MOSFET
Photographs36 full-size gallery images
Downloads1 local design and reference files

Project Notes

A supply-pin-driven LT1223 front end with lateral MOSFET outputs. The build progressed through oscillation diagnosis and compensation changes to a completed, very fast amplifier documented with final assembly photographs and extensive scope captures.

diyAudio discussion

Photo Gallery

20250325 073054
1. 20250325 073054 		20250325 073103
2. 20250325 073103 		20250325 194437
3. 20250325 194437 		20250412 180600
4. 20250412 180600
20250412 180606 HDR
5. 20250412 180606 HDR 		20250412 180618
6. 20250412 180618 		20250412 180633
7. 20250412 180633 		20250412 180637
8. 20250412 180637
20250412 180719
9. 20250412 180719 		fft 1khz
10. fft 1khz 		lt1223 pcb
11. lt1223 pcb 		lt1223 schematic.03.ok
12. lt1223 schematic.03.ok
new generator
13. new generator 		olg
14. olg 		sinus 33khz
15. sinus 33khz 		sinus 67khz
16. sinus 67khz
sq 108khz
17. sq 108khz 		sq 18khz
18. sq 18khz 		squares 100khz
19. squares 100khz 		squares 33khz
20. squares 33khz
squares 67khz
21. squares 67khz 		test bench
22. test bench 		thd 1khz
23. thd 1khz 		triangle
24. triangle
20250329 171039 HDR
25. 20250329 171039 HDR 		20250329 171037 HDR
26. 20250329 171037 HDR 		20250329 170900 HDR
27. 20250329 170900 HDR 		20250330 102007 HDR
28. 20250330 102007 HDR
20250330 102000 HDR
29. 20250330 102000 HDR 		20250330 101740 HDR
30. 20250330 101740 HDR 		20250330 101733
31. 20250330 101733 		20250330 101726 HDR
32. 20250330 101726 HDR
20250328 152522 HDR
33. 20250328 152522 HDR 		20250328 152128 HDR
34. 20250328 152128 HDR 		20250328 152111 HDR
35. 20250328 152111 HDR 		20250328 152046 HDR
36. 20250328 152046 HDR

Design Files and Documents

LTspice simulations

FileSize
LT1223.lat.03.ok.asc 8 KB
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