Help me understand complementary push pull amp

[nix85]

Here is an article on push pull amps.

https://www.electronics-tutorials.ws/amplifier/amp_6.html

Second diagram shows two NPN transistors back to back and you can see how current flows for each halfcycle as nicely drawn.

But i don't understand NPN PNP combination, first diagram, shown below.

During positive halfcycle TR2 is off, TR1 conducts and current flows through it and through load to ground.

All sweet, but...

During negative halfcycle TR1 is off, TR2 is on and.....? How does the circle close?

TR1 is off, Vcc is disconnected.

Red arrow now shows current flowing in opposite direction.

Something's missing in these diagrams (they are all like this).

[lancaIV]

https://worldwide.espacenet.com/publicationDetails/biblio?DB=EPODOC&II=13&ND=3&adjacent=true&locale=en_EP&FT=D&date=19900104&CC=DE&NR=3821856A1&KC=A1


http://translationportal.epo.org/emtp/translate/?ACTION=description-retrieval&COUNTRY=DE&ENGINE=google&FORMAT=docdb&KIND=A1&LOCALE=en_EP&NUMBER=3821856&OPS=ops.epo.org/3.2&SRCLANG=de&TRGLANG=en




Developped in the End80 as low cost renewable energies net-grid infeeder !


Positive half cycle phase + negative half cycle phase = full cycle




Probably therein you will find the right direction of answer




Sincere


OCWL

[nix85]

How is the circuit closed during negative halfcycle?

[lancaIV]

It is combinating the half cycles "automatic",by nature" !


The two transistors ,look for their direction,are only conducting the path !


The dotted lines are the "virtual" path

[nix85]

Please, if you don't know the answer, don't spam.