[sdiy] Effect of unconnected linearisation diodes in LM13600/13700

Dave Kendall davekendall at ntlworld.com
Mon Jan 20 19:32:43 CET 2014


Hi all.

If the linearisation diodes (and the darlington buffers) are left 
unconnected in a circuit using 13600/13700, will there be any effect on 
the operation of the chip? Does their mere presence change the 
behaviour of  a given circuit, compared to the same circuit using a 
CA3080? (assuming the layout is as similar as can be, given the extra 
OTA and the two different DIL package sizes)

In a forum thread I am following, it's been suggested that perhaps the 
capacitance of the diodes *might* affect the circuit, even if not 
connected, making the behaviour of a circuit different to the same one 
using 3080s.

Has anyone has done any tests, or can otherwise comment?

cheers,
Dave




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