Clone Goldmund Amplifier

Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Jump to Latest
hien.t.nguyen

hien.t.nguyen

Member
Joined 2008
Schematic protect speaker
 

Attachments

  • protect.GIF
    protect.GIF
    15.6 KB · Views: 1,653
hien.t.nguyen

hien.t.nguyen

Member
Joined 2008
tommy1000 said:
What are this two parts function on the Metis 3? Part of protection? Can you show us?
Click to expand...

Yes.

Part protect circuit of the metis3 including two IC: TL074CN and 74HC00D.

TL074CN have four units opam,using two 2 units opam for sampling from B+ comparison with voltage reference,not use 2 units.

74HC00D to control driver relay speaker.

When have problem on B+ is voltage reduced => Protect

Not protect zero DC.:confused:
 
Last edited:
hien.t.nguyen

hien.t.nguyen

Member
Joined 2008
tommy1000 said:
Thank you
Click to expand...

My opinion, to perform this simple function not need to use complex circuits diagram so.

I also do not understand why Goldmund use the TL074 (4 units opam) without using the TL072 (2 units opam):confused:

There are places they use components is optimal.But there are many places they use components very difficult to understand.

When I clone them,I usually remove these parts.

Regrads,
 
Last edited:
P

Phuong.hng

Member
Joined 2008
hien.t.nguyen said:
Not connected anywhere.

Positive of the opam always is Low
Negative of the opam always is High
=> Output opam always is Low

This Low level will comparison with voltage is 70/11k/2= 3.18V

When have problem in B+ is this voltage will up or down => the change in output 74HC00D (pin11)

Regrads.
Click to expand...

What exactly are you trying to build? Can you tell me about that?
 
Status
This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.
Top Bottom