Amplifier Circuit DiagramsAudio Circuit Diagrams


A lot of people who have heard or heard about the transistor synchronization process have heard or heard about me personally a few months ago. Some of these things are learned in the amp; exit equalization of transistors english ” transistor matching ” process I learned that it is important.

This process is also useful in power electronics and other applications other than audio electronics.

As we know, NPN and PNP transistors work together on output stage in bjt or mosfet transistor amplifier circuits or only NPN transistors


The above example shows the situation in the example of the amphitheater is clearly understood that the transistor groups are equal to the process though I do not say this is necessary, but quality, performance, etc. is useful for a lot of things, even some foreign sites, on eBay synced transistor packages sold in some manufacturers used in the circuits of the transistors are synchronized on the by pressing.


The simplest is the normal measurement with the multimeter, for example, for Bjt transistors, the 2 transistors should be identical with the Beyer and Emitter, the Collector values ​​should be the same or very close.

for example, in digital multimeter, the A transistor should be the same or very close value in the measurement between BC and 670 in the other.

A more robust guarantee method with a few resistance connections to provide voltage measurement

BJT transistor equalization measuring circuit;

The resistors used for a healthy measurement of transistors must be 1% tolerant by measuring the voltage at the VC approx

Calculating the hFE value of transistors;

Calculating the hFE value of transistors;

VRB = Voltage between ground resistance
VRC = Voltage between collector resistance

Baseline flow : IB = VRB / RB

Collector current : IC = VRC / RC

hFE = IC / IB

hFE = (VRC / RC) * (RB / VRB)

Mosfet synchronization;

I = 20mA ⇒ R1 = 560 5
No matching is required for these devices; The VGS is between 4-4.6V and that they work.

VGS at about 170mA. 2W resistor, or two at 100W at 1W resistors in parallel. P-channel devices. P-channel devices.

match VGS to 0.30 in. VGS divided by 5mA. VP1GS is 100mV, then 0.1 / 0.005 = 20,. You would then be able to use the MOSFET source with the lower VGS.

Calculating the hFE value of transistors;.jpg,


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