Antilog

log(V1/V2)=log(V1)-log(V2)=D 100*antilog(D)=100*(V1/V2) search for logarithmic and anti logarithmic amplifier circuits or ICs.

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.

I want to write verilog code ,of mathematical function like log(x),x^y,antilog(x),sin or cosine function....how i can write?

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

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.

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

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

Hai all, 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, Thanks Grittin

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?? Please explain..

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

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.

hi! i know of no paper but op amps with diodes produce nonlinear outputs. try searching for log and antilog amps in google. Ü - al

Hi Abo_Ayat, 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. Regards Z

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

KRAL wrote Regarding compression-decompression: In this context, we're referring to a situation in which we are processing an input signal that has a large dynamic range, and a large Signal/Noise ratio is desired for low level inputs. You can not simply amplify the input, because the output would saturate in the p