Search Engine www.edaboard.com

144 Threads found on edaboard.com: Analog Multiplier
You can build an analog multiplier using two log amplifiers, an exp amplifier (also called anti-log amplifier) and an adder. For details you can
can anyone of u send me the design procedure of analog multiplier? My bet is you want voltage multiplier not frequency multiplier? Procedure for frequency multiplier is a little bit more complex. Anyhow: AD633 from analog.com. Circuit schematics are included in datasheet of this chip. (...)
Does anyone know about how to design "current mode" analog multiplier. I mean I0=I1*I2
Hi, a would like to make an analog multiplier based on op-amp or/and transistor. Can anyone refer me web pages or help me. thank
A mixer produces at the output sums or differences of the input frequencies. To do that it needs at least one non-linearity, such as multiplication or squaring, in its transfer function (and proper filtering at the output of course). Every analog multiplier can effectively be used as a mixer. The inverse doesnt hold. For example a circuit with o
hi i am working on analog multiplier. i want to know the book name where i get some material about in.plz help me
hi i m designing 4 quadrent analog multiplier. there r four ip terminal in my strecture. i m giving V1+v1, V1-v1, V2+v2, V2-v2, signal at the input terninals, where V is D.C. bias and v is analog signal. i m gettin correct out put.but i dont know how can i do a.c. analisis of the circuit. i mean apply same ac signal at all the terminal (...)
hi i m designin four quadrent analog multiplier. the topology which i choose is given in fig. i designed symatic and the designed circuit give correct output for input dynamic range -1 V to 1V. i designe the circuit in voltage mode. but one of my frnd say it is current mode circuit. and he say that this will not give correct out put when it is
hi i m designin four quadrent analog multiplier. the topology which i choose is given in fig. i designed symatic and the designed circuit give correct output for input dynamic range -1 V to 1V. i designe the circuit in voltage mode. but one of my frnd say it is current mode circuit. and he say that this will not give correct out put when it is f
can anyone has analog multiplier circuit then do send me also if u have C coding to build the analog multiplier then multiplies the signal and NRZ level and phase shifter bcoz my proj is BPSK modulator SO SEND ME THE CODING AND CKT THANX REPLY
can anyone has analog multiplier circuit then do send me also if u have C coding to build the analog multiplier then multiplies the signal and NRZ level and phase shifter bcoz my proj is BPSK modulator SO SEND ME THE CODING AND CKT THANX REPLY
Required linearity? Frequency range? 4053 is an analog multiplexer. It can be used as a sign multiplier, multiplying a square wave carrier frequency with an analog signal. If the application allows to filter harmonics in the output spectrum, it can work as a high linearity analog multiplier replacement.
If you are worried about noise, the analog multiplier is the best one because it works on low level signals where noise is important. If you severely low pass filter the output (equivalent to integrating for a long time) the measurement will be less contaminated by noise.
Hi: Try searching for Gilbert cell multiplier, online. You can find lots of material on it since it is the most commonly used analog multiplier. Rgds
I assume that you are posting in the analog forum you want an analog multiplier. Do you want to multiply two analog signals or produce a higher harmonic of a sine wave. For the first there is the original Gilbert multiplier from his 1968 paper. He took the four quadrant switching mixer which dates back to (...)
Take a look at the datasheet for the 74HC4046. The simplest digital comparator is the XOR gate. More complicated ones use edge-triggered flip-flops. For the analog one, look at the datasheet for the LM565: and this appnote:
Hello, Can you tell me how to set up a multiplier for AC analysis of SIMPLIS? Thanks ynhe
can u tell me about an IC which can multiply two analog signals
The physical signals in everyday life are all analog. Computers use digital signals and processing methods. Before and after digital signal processing, we should use analog signals and processing methods. Due to the advantages of digital signal processing compared to the analog signal processing, DSPs are dominantly used rather than ASPs. (...)
I need to use an analog multiplier in my circuit like AD633. i need to multiply a message signal with the carrier. Can anyone give an appropriate IC?
hi. u can find it in one of these cites :
here the 4 PMOS transistors are in saturation and all other NMOS transistors are linear. can anybody explain me how this multiplier works ? if anybody could explain it with equations it will be really helpful well the o/p is taken as vo1-vo2= (kp/(kn*km))*(xy)
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 (...)
If you have the analogLib: pvcvs2 or ahdlLib multiplier or functional multiplier.
I m making a "CMOS analog multiplier". currently am trying to simulate the proposed circuit in multisim from the below given pdf file...... analog multiplier PDF DOWNLOAD
A common way to do analog multiplication is with a Gilbert Cell.
If you use an analog multiplier and feed your signal into both inputs you will get a double frequency output and a DC output. Capacitor coupling will eliminate the DC. These chips go by MPY pefixes. The old Burr Brown now bought by TI has some. Here is one If you want a cheaper form, use
first you should use vdd>Vout. if you another input is constant, you can use amplifier with gain(=Vin1). If two input is not constant,use analog multiply.Pls ref national application an31.pdf(use google to find it).
CV104 I got one Burr-Brown MPY634 analog multiplier but for ranges I am going to use it is fine, or seems fine to me. thank you. zanove
To expand on Flatulent's response, you can build a four quadrant multiplier out of Gilbert cells (they can be constructed out of <10 discrete transistors). Refer to the following link:
analog PLL has a multiplier type PD while Digital one has PFD, JK or XOR circuit. nathan
well.... a pll is never really pure analog - somewhere in the system you need to compare the phase, which gives a discrete-time voltage. this voltage may be a sine wave, but it is "chopped" in a digital fashion. sum all these chopped chunks of sinewave into a cap, and you creates a voltage proportional to your phase difference between the signal
Hi, razavi's classical analog IC book talks about it, the common used one is Gilbert cell, you can also search in google to find papers.
An analog multiplier makes a nice modulator, if you don't need much power. Put the carrier on the X input, and the audio on the y input, or vice-versa. Folow this with a pwer stage with the appropriate power capability.
nemolee, do you want an analog multiplier or a digital multiplier?
I am working on a PLL project and presently trying to figure out which architecture to choose. Are todays PLLs fully digital except VCO or do they have major analog parts as well ? If So, what is the advantage of using analog ? is it precision ?
Please specify your questions. there are lots of application of Gilbert cell in analog IC design, especially in RF part.
here you can check information about analog multipliers
try National Semicon analog multipliers.they have a such line
I've read that in a mixer's output there is the sum and subtraction of two input signals, by multiplying both signals due to non-linearity of a device. There P1dB curve shows a region where Pout is lineal with respect to Pin, so if the device works in this lineal region, why there is a multiplication in its output ? Hope my question is clear
There are severasl ways to get a double frequency: You can use a designed CI but they are for GHz frequencies. There are several ways to implement them: use an analog multiplier and in both input put the signal you want to double the frequency, at output yo need a band pass filter with center fequency at double of the frequency of the signal.
Low-jitter clock multiplication: a comparison between PLLs and DLLs van de Beek, R.C.H. Klumperink, E.A.M. Vaucher, C.S. Nauta, B. Univ. of Twente, Enchede, Netherlands This paper appears in: Circuits and Systems II: analog and Digital Signal Processing, IEEE Transactions on [see also Circuits and Systems II: Express Briefs, IEEE Tr
how to implement a square root extractor ?The input is analog voltage signal. Most of the cases are implemented by analog multiplier
Piierre, Run the signal through a highly non-linear circuit, such as a squaring circuit (analog multiplier with x, y inputs tied together) or a rectifier. This will produce an output consisting of: . 1) Original signals . 2) Harmonics of the original signals. . 3) Intermodulation (IM) products (signal whose frequencies are equal to the sum
elec_eng, A comparator will provide a square wave of the same frequency, but the output amplitude would be a function of the comparator supply voltage, and would be independent of the amlitude of the sine wave input. . To provide amplitude control, you would need some kind of regulator. An analog multiplier could be used as the gain controller.
It is all a matter of what sort of ethics you have. For instance, Darwin claimed the published work of his grandfather as his own. One shortcoming of human nature is to not admit making a mistake. Academics and journalists are quite famous for suffering from this moral vice. you might want to visit which has
It possible to do it with pure logic even with autotune when freq change . You will need much high clock (more - better resolution). The one counter measures half period another is preload abd sub type gets couted pulses div by 2 (skip MSB bit from first counter) from the first counter. The both sum of insig rise fall and sub counter output mixed g
Hi, Search your PLL in
Hi, are there any ideas how to square / squareroot a signal in the analog world? This should not be done with a DSP! Ideally, I'd like to build up a circuit with the following transfer function: OUTPUT=√(x?+y?) -> Square signal x, square signal y, sum them up, squareroot the result I've already found multipliers such as the (...)
You can use analog multiplier, but it will be actually regulated attenuator instead of VGA. So probably you will have to place an amplifier stage after the analog multiplier.