fet simply amp

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STD fet simply amp

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Cloned from fet ne reg

Update time： 2024-11-30 16:28:02

Creation time： 2023-09-23 14:08:28

Description

very simple cheap fest ampli and with good performance. i ll be glad to anyone will improve the circuit and makes one side pcb. thanks

set the bias as about 3,1 volts on gate of irfp240. turn r9 from minimum resistance , then turn until 3,1 volts on gate fets- you can use various devices in input differential stage like bc 239, 2sc1845, or fets like 2n 7000- for q3 you can use 2sb649 or others. the picture published is mounting two output fets only. r2 is input sensitivity. i tested it until +60 -60 volts.

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BOM

BOM download Purchase Parts

ID	Name	Designator	Footprint	Quantity
1	IRFP9240PBF	Q7,Q5	TO-247AC-3_L15.8-W5.0-P5.46-L	2	C2686
2	1N4148	D1,D2	DO-35_BD2.0-L4.0-P8.00-D0.5-FD	2	C14516
3	IRFP240PBF	Q4,Q6	TO-247AC-3_L15.8-W5.0-P5.46-L	2	C2674
4	10 uf	C1	CAP-D3.0XF1.5	1
5	22pf	C2	RAD-0.1	1
6	47uf	C3	CAP-D3.0XF1.5	1
7	22uf	C4	CAP-D3.0XF1.5	1
8	0.1uf	C5	RAD-0.1	1
9	47u	C6,C7	CAP-D3.0XF1.5	2
10	2N7000	Q1,Q2	TO-92(TO-92-3)	2	C9114
11	IRF9640PBF	Q3	TO-220(TO-220-3)	1	C2628
12	1k	R1	AXIAL-0.3	1
13	100k	R2	RES-ADJ_3386P	1	C125022
14	10k	R3	AXIAL-0.5	1
15	51k	R4	AXIAL-0.3	1
16	33k	R5	AXIAL-0.3	1
17	680	R6	AXIAL-0.3	1
18	2k7	R7,R8	AXIAL-0.3	2
19	2k2	R9	RES-ADJ-TH_3PIN-V-L9.53-W9.53-PITCH2.54	1	C118965
20	0,22	R10,R11,R14,R15	AXIAL-1.2	4
21	10	R12	AXIAL-0.5	1