Position: Index > Amplifier Circuit >

Power amplifier 12W FET

2015-01-01 16:27  
Declaration:We aim to transmit more information by carrying articles . We will delete it soon, if we are involved in the problems of article content ,copyright or other problems.

FET 12W Audio Power Amplifier

Power amplifier 12W/8? FET

   ???? ?????? ????????? ?? ????, ???? ?? ???? ???? ???????? ????. ????????? ??? ???????????? ???? ????? ????????? (??5534), ??? ???? ??? ?????????? ???????? ??????? ???????, ?????? ?????????, ??????? ???????????? ??? ??? ?????????? ??????????? V-MOSFET ???? ?????. ?????? ?? ?????????????? ?? IC1, ?? ?????? ???? ?????????? ??? ?? ????????? ??? ???? ??????????? ??? ?????? ??????, ??????????? ????? ?? ?????????? ? ???? ??????????? ??? IC1 ??? ??????? ??? ???????????? ???, ????????????? ?????? ??? ?????? ??????. ??? stereo ?????????? ?? ?????? ?? ????????? ???

   A small power amplifier, but with very good quality of sound. It combines a completed very good quality (NE5534), that has the possibility of control of low loads, high speed, low distortion and two transistors of technology v-mosfet in the exit. It can be replaced IC1, with some other equivalent and we increase the supply in the stage of expense, always being careful is maintained the supply voltage of IC1, in the levels of his specifications, achieving increase of output power. For stereo operation will be supposed are made two units.

.

Specifications

Output Power12W in 8? (max)
Input sensivity3.2V rms (max)
T.H.D0.002% (1KHZ)
Frequency ResponseDC - 100 KHZ (-3dB)
.

Part List

R1= 33KohmR8-11= 10KohmC7-8= 100uF 40V
R2= 6.8KohmR9-10= 0.47ohm  2WD1-2= 18V 0.5W zener
R3= 22KohmC1= 1nF 63VD3-4= 1N4148
R4= 100KohmC2-5= 47uF 40VIC1=NE5534
R5-7= 1KohmC3-4= 100nF 63VQ1= 2SK135
R6= 330ohmC6= 4.7pF ceramicQ2= 2SJ50

    ??? ?????????? ??? ???? ?? ????, ??? ?????? ??? ????? ???? ????????? ??? ????????? ??? ????????????? ??POWERVMOSFET??? ?????? [2SK134or2SK135] [2SJ49or2SJ50], ????? ??? , ?? ??? ????? ?????????? ??? ?????????? ????? ??? ??? Toshiba ??? ????? ?????? ??????? ?? ??????? ?????. ??????? ?? ??????????????? ?? ?? [2SK1530N-FET ???? ???? ???2SK135] ??? [2SJ201P-FET ???? ???? ???2SJ50]. ?? ??? ?????????? ????? ?? ???????? ???? ??-3? ??? ??? TO-3 ,???????? ?? ??????????? ?????? ??????????? ??? ????? ?????? ?????????? ???????????? . ???? ???????? ??? ?? ??? ?????? ??? ????????????, ????????? ??? ?? ????? ??? ????????? ??? ???? ??? ?? ??????????. ?? ??? ?????????? ??? ?? ??? ????????? ????? ??? ?? ?? ????????? ?? ???? ??? ??????? ?? ????????????? ??? ?? ?? ????????????.

   A branding that I want to make, that is in effect for all the amplifiers that I publish and use thePOWER VMOS FETof series [2SK134or2SK135] [2SJ49or2SJ50], they are that, more above transistor they are not produced more by the Toshiba and are enough difficult they are found henceforth. They can be replaced with [2SK1530in the place of2SK135] and [2SJ201in the place of2SJ50]. The new transistors are in plastic case ??-3? and no TO-3, bear in bigger supply of operation and have positive factor of temperature. This mean that with the increase of temperature, is increased and the current that is gone through from through the transistor. The new transistors him I have still not tryed and me it would interest to learn if somebody him used also with which results.

Dataseets for2SK1530Dataseets for2SJ201

]


Reprinted Url Of This Article:
http://users.otenet.gr/~athsam/power_amplifier_12w_fet.htm