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Yes ,it is right, and here is the link of L293D. And you will get the circuit at page 4 of it .
https://docs.google.com/viewer?url=http://www.jvmbots.com/pafiledb/uploads/2094d75f6b33202ecab8d50ccbc2c639.pdf
and also i have uploaded the file as followed.
good luck!
Limiting Amplifier
hi
maybe it will help you !
Pins 4 and 5 are the HI and LO inputs, respectively. Both inputs are biased internally to 1.725V.The limiter output is a pair of differential currents of magnitude, IOUT, from high impedance (open-collector) sources. These are converted to...
hi
what you want is '500 mVrms (an AM signal) to about 2 to 4 Vrms.. '.
but the value from lm7121 is just 2*500 mVrms=1v.
Vo=((Rf+Rg)/Rg)*Vi.
YOU can use 2.2Kohms for Rf.
good luck!
hi
i do not think you can do it like that,if one is low ,and all low.you can use one power supply cricuit to four channels ,and you 'd better use 4*100UF E-CAP at the same.
u use simple current mirror ,i do not know weather the Voltage will be right.
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