15 Threads found on edaboard.com: Antilog
search for logarithmic and anti logarithmic amplifier circuits or ICs.
Analog Circuit Design :: 07-12-2014 23:51 :: Borber :: Replies: 1 :: Views: 466
I don't see a log function plot in the third curve, only y = -exp(-x). It would be of course generated by an antilog circuit, as you apparently did. Nice try to fool people at edaboard.
Analog Circuit Design :: 05-22-2014 17:44 :: FvM :: Replies: 2 :: Views: 534
I want to write verilog code ,of mathematical function like log(x),x^y,antilog(x),sin or cosine function....how i can write?
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 03-09-2014 22:26 :: rids1 :: Replies: 1 :: Views: 1472
In Pspice, a square root circuit can be easily "designed" by using ABM (analog behaviour modelling).
For a real hardware circuit, you can refer to analog multipliers, see an example in the AD633 datasheet
Or use a suitable combination of log/antilog circuits. The basic conce
Microcontrollers :: 09-16-2012 17:50 :: FvM :: Replies: 1 :: Views: 1194
The fast way is to...
take the logarithm of your number. (Any base)
Subtract from zero (the log of 1). Or change the sign.
Take the antilog.
This gives you the reciprocal of your original number.
It's easier if your pic has a logarithm table.
Microcontrollers :: 08-31-2012 04:02 :: BradtheRad :: Replies: 1 :: Views: 511
There are basically two types of analog dividers:
- based on four quadrant multipliers (e.g. AD734)
- based on log/antilog circuits
The log/antilog designs are slower and restricted to single quadrant operation but offer a higher dynamic range. AD538 is an example of an integrated version, but this circuits can be also build from OPs and trans
Analog Circuit Design :: 08-05-2012 08:29 :: FvM :: Replies: 5 :: Views: 1216
The log/antilog circuit doesn't work as shown and the transfer characteristic isn't calculated correctly. It would work for sqrt(x*y). But to calculate x*y, the adder must have a gain factor of 1 for both inputs. So the output has an unwanted offset of 1*Vbe. For a temperature indepent log/antilog multiplier, you need a third log stage with a const
Digital Signal Processing :: 01-30-2012 18:29 :: FvM :: Replies: 7 :: Views: 1586
I am looking for Quad matched pair transistor for analog divition.
Need minimum 3 matched pair, two for log and one for antilog.
I found MAT14, Do you have any other part,
Analog Circuit Design :: 11-29-2011 06:09 :: grittinjames :: Replies: 2 :: Views: 851
In logarithmic or antilogarithmic Amplifier using OPAMP (IC 741) sometimes we use a diode and sometimes we use a transistor..
Which one is mostly used??
Elementary Electronic Questions :: 05-11-2010 14:44 :: Anirban Mitra :: Replies: 0 :: Views: 3575
an arithmetic divider that operates ideally at any frequency
Keep on dreaming.
From the existing analog multiplier/divider variants, only "gilbert cell" (gm multiplier) is wideband. Log/antilog offers higher dynamic range but
is restricted to MHz bandwidth at best, hall sensor multipliers (rather unusual) possibly achieve a sim
Analog Circuit Design :: 02-06-2010 12:19 :: FvM :: Replies: 11 :: Views: 6642
can anyone say me how to realize log and antilog in same fpga hardware using lookup table(LUT),interpolation steps.please send me the codes and other detail to execute my final yr project.
PLD, SPLD, GAL, CPLD, FPGA Design :: 12-31-2009 06:05 :: simalneelifeld :: Replies: 0 :: Views: 1074
i know of no paper but op amps with diodes produce nonlinear outputs. try searching for log and antilog amps in google. Ü
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 04-13-2007 07:52 :: acbalbason :: Replies: 1 :: Views: 748
I assume you need "true" multiplication, i.e., not for
modulation/demodulation or similar applications.
One method is using logarithmic amplifiers for both signals, then summing and finally an antilog amplifier. This method uses Op Amps and external transistors.
Analog Circuit Design :: 05-25-2006 18:43 :: zorro :: Replies: 11 :: Views: 13077
Hi all, I have some questions related to log and antiloge amplifiers.
1- how does the log and antilog amplifier circuits look like?
2- what does the two circuits do?
3- how does the circuits work?
4- the applications of both log and antilog amplifiers?
5- examples of where we can find these circuits?
I hope to hear from you soon
Analog Circuit Design :: 10-18-2005 06:02 :: Y_me :: Replies: 2 :: Views: 3618
hi there, please help me, what is wave form from the output signal of logarithmic amplifier and antilog amplifier? where do we use those kinds of amplifier? what makes them called logarithmic and antilog amplifiers?
thank you :)
Analog Circuit Design :: 09-28-2005 14:49 :: zhi_yi :: Replies: 10 :: Views: 10117