Jane Medium ： Here we enjoy the output circuit of a power audio amplification circuit ,  We see the diversity of the circuit in the form of expression .  It also reminds us to treat circuits   Be able to look at it in a more flexible way .

key word ：OTL, Power amplification

§01OTL Power amplifier circuit

   today Heaven is in B In the station The power amplifier circuit designed by foreigners is called awesome , Think about 3 For months, I can't understand the direction of current . notice UP This paper mainly introduces the circuit of a foreign audio power amplifier electronic product . At a glance, it makes people feel that this circuit works strangely .  This is the circuit that the video author traced directly through the actual circuit .  This is the circuit diagram drawn by the author in the video , The author should be negligent , take T1,T2 The position has been changed .  Change the drawing structure of the circuit diagram ,  This forms the common circuit form .  The characteristic part of this circuit , Is to filter the power capacitor At the same time, it is used as the output coupling capacitor ,  This greatly simplifies the design of the circuit .

   It turns out that there is another confusing place in the circuit ,  That is about the setting of circuit reference ground .  Usually, the output of the circuit power signal is in the middle of the half bridge power tube .  Here, let's appreciate the charming characteristics of the circuit again .

※ total   junction ※

   stay Here we enjoy the output circuit of a power audio amplification circuit ,  We see the diversity of the circuit in the form of expression .  It also reminds us to treat circuits   Be able to look at it in a more flexible way .

■ Links to related literature :

• The power amplifier circuit designed by foreigners is called awesome , Think about 3 For months, I can't understand the direction of current .