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97 Threads found on Analog Multiplier
Hi i designed an analog multiplier. I found a lot of works on subthreshold and saturation mostly as compared to triode region. In general why not in triode region. What are the general disadvantages regardless of the multiplier circuit design. Becoz if multiplier is required to have a linear operation then triode region (...)
I was reading a paper "A Novel Simple Current-mode multiplier/Divider Employing Only Single Multiple-Output Current Controlled CTTA" regarding analog multipliers. And in the introduction part they have mentioned abt BJT. "Unfortunately, they are suitable for working only in voltage-mode. They cannot be applied to employ in a current-mode (...)
It should be noticed that if the input signal is noisy (but the reference signal isn't), using an analog sign multiplier instead of digital XOR will give you better signal-to-ratio in product. The input signal should be also low-pass or band-pass filtered to suppress harmonics that would be demodulated in the product detector.
Hi can anyone pls explain me how an analog mulitplier can be used as AM modulator??? I can see multiplier is nothing but simple multiplication of two inputs. So say my message signal amplitude(peak) is 4.. and then so after modulation i expect the carrier in correspondance with the peak point of the messgae signal to have 4V as well.... but say my
I guess you omitted an important detail. There should be an analog switch connected to node F. The circuit is operating as a sign multiplier then.
Another approach which is seeing some popularity in ROICs is to use a smaller inegrator, and when it limits you reset the cap and increment a counter. You can accrue 2^N-1 times the cap value's worth of charge as a hybrid digital (MSB to LSB-1) / analog (LSB) combination.
analog Devices AD633 is a good general purpose analog multiplier.
hi Anyone worked on digital pll ? I want to make a design on it but without using any kind of analog circuit. I though about this and may be I need to design clock multiplier and divider to generate a desired clock frequency by reference clock. If anyone have any document or link .. please let me know. Thanks Rahul J
Hi Juz_ad! In the past, I was looking for a solution to an analog divider with single power supply, but only managed a multiplier circuit based on the MC1495. With the divider circuit I have not such success. I think that may be a base of your analog divider development. Feri. Sorry for my English. If you need the complete (...)
I would use an analog multiplier for constant power regulation. You should supplement your requirements by an accuracy specification.
I have designed a 16-bit modified radix-4 booth multiplier in cadence and simulated it using ADE (analog Design Environment). I wonder if there is any automatic method to calculate the worst case propagation delay of this circuit or I have to use a brute force method to find it? As a matter of fact I don't have enough time to measure the delay of
what is the working of CMOS analog multiplier? How is it work?
i am using CMOS combiner cirand CMOS substractor circuit for Four quadrant analog multiplier. then how is it work and how it is connected?
which factor and which type of input given to the multiplier circuit for DC characteristics on analog multiplier? - - - Updated - - - thanks in advance
It's possible with industry standard analog multipliers like AD633. As you are designing a feedback system with variable gain, achieving stability for all operation conditions isn't quite easy, but basically possible at the cost of bandwidth.
Hi, i am an electronic enginnering student and i am designing a four-quadrant analog multiplier for the graduation project. i want to know how i measure frequency response for two inputs in virtuoso. yes, for one inputs it's simple but in more than one input, i do not know how i can measure the frequency response of multiplier for each (...)
Suppose, a 4-bit x 4-bit array multiplier has been designed using the AND gates and Adders. My question is- Whether that multiplier is analog device or digital device? Since the transistors are used to design that multiplier, it must be an analog device. But the inputs and outputs of that (...)
Is it a good idea to use on chip resistor to provide biasing currents to the current mirrors in analog circuit ? Or should self biasing "beta multiplier" ckt be used to generate this biasing current always ???? Also what are the disadvantages of using the biasing resistor external to the chip to generate bias current inside the chip , in t
Sorry. The CD40xx Cmos digital ICs are not the same as the AD734 analog IC.
it is close to an analog design. We did a project a digital clock multiplier by two (long time ago), so then you could divide by two and have a 50% duty cycle, but you need to be very carefully with the backend steps. The idea is xor with the same signal on both input, but one input has multiple buffers/delay (25% of the input signal).
There are many frequency doubler circuits (both digital and analog) floating around on the internet. The simplest is an Inverter tied to a XNOR gate. Triplers are a tad more difficult. E
An analog multiplier can be use for various types of AM modulation, but not directly for FM modulation. For that you need a device whose phase or frequency can be varied.
Hello everybody! I'm a beginner on spice softwares and here too 8-) I'm trying to simulate an analog multiplier IC from analog Devices Manufacturer. I downloaded a "Spice Model" from: So I got a file named ad633.cir and
I have been reading that it is possible to add a 5.1V zener diode and a 220R resistor to the analog pins to provide extra over voltage protection. It there any reason why you couldn't use a 'rubber zener' / 'Vbe multiplier' in place of the zener diode?
I'm looking for a circuit that would allow me to invert the sign of an analog signal with a digital control signal. I was thinking of building a unity gain amplifier and an inverting amplifier with gain -1 with 2 op amps, and use a MOSFET or such to switch between them. Does anyone have experience with such a circuit? Also, I'd need fairly high p
Hello, I need to verify a layout of a circuit, making a very long simulation with random inputs. I think it will take million of clock cycles, so i can't verify "at hand" the correctness of output. Could anybody suggest me how to make a testbench of an analog circuit? Thanks :)
i am a beginner of the analog circuit design. i can understand how the beta multiplier work, but the stat-up circuit's work principle really confused me... can anyone help to describe how it works? 82756
A common way to do analog multiplication is with a Gilbert Cell.
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.
Best method to measure power uses real-time V*I multiplier chip with current transformer 1:500 step-up and voltage sense with signal step-down voltage transformer (both small) to measure outlet power in RMS. Many other methods exist... This one requires some analog skills.... 77560 see end of document... cds.linea
i have analog triangle signal which is output of intregrator parameters are this v(p-p)=1.22v v(rms0=1.27v f=2khz and digital parameter which is another signal v=7.62v v(p-p)=1.54v f=6khz vrms=13mv now both this paramer is multiplying by multiplier so plsss suggest any best multiplier ic ya any single op-based circuit .. thanks
To detect this protocol requires a mixer with clock recovery signal. Digital mixer uses D FF but is sensitive to noise and does not use all the energy of the bit. other method uses analog multiplier (non linear amplifier with clock * Data.) clock must be in phase (PLL) Good luck. why use RZ code? why not use something else?8-) 50Gbps FF here
The simple answer is an analog switch, e.g. CD405x series, which also offers bipolar supply. For a sign multiplier, an active circuit (usually with an operational amplifier) is required in addition to the analog switch.
The term lock-in amplifier suggests in my view, that the carrier is recovered from the signal, otherwise it's regular synchronous demodulation. You consider an analog multiplier as synchronous demodulator. That's a straightforward method. In applications with a fixed carrier frequency, a simple +/- 1 sign multiplier and a square wave (...)
So much for wanting an analog solution. The AD9858BSVZ is a 100 pin TQFP DDS monster at $70 each. I guess this isn't a home project!
Why you are asking for an ADPLL? A simple "analog" PLL chip, e.g. 74HC4046 can perform the 64 to 8192 kHz multiply. The dvided clocks will be available from the frequency divider without additional effort.
If you want a ramping 100 hz square wave, you will need an analog multiplier, not a digital circuit. Try the analog devices AD633, and input the ramp to x1 and the 100 hz signal to y1. You will have to generate the ramp somewhere. You can have a somewhat non-linear ramp by just R-C filtering a 1 bit signal. If that is not linear (...)
By gm i mean the transconductance of the mos. For constant-gm biasing you can refer any of the books on analog ckt design (razavi or grey, meyer) or some of the threads in eda have the references.
... any other circuit for cmos analog multiplier. Let me google that for you
Check analog Devices portfolio, they have some. I have used 1:4 mux up to 2.4GHz.
Hi Check this AD 633 multiplier for your reference
BPSK can be calculated by multiplying your carrier wave (sinusoidal wave form) with a bipolar bit stream. (for example 1 = 1V, 0 =-1). The multiplication assures that the sine wave inverses (flips around the time axis). This means you need a sine wave source, your bipolar bit streams source, and an (analog) multiplier. Basically QPSK is the ma
Amlitude modulation means varying the amplitude of a carrier. What's your problem with it? In analog design, e.g. a programmable voltage divider or a multiplier can achieve it.
For the selection of a suitable phase detector, you have to consider at least the input and NCO waveform, the input signal to noise ratio and the intended lock range. The best analog performance for sine waveforms, but a limited lock range is achieved with a multiplier, as usually done with classical analog lock-in amplifiers. For the loop (...)
i am working on a frequency hopping transceiver design now i want to synchronize receiver with transmitter hopping frequencies. i am using DPLL for this . i am using a multiplier detector. what filter should i use and how can i make my DDS work like VCO as in analog PLL. i am working on system generator 9.2.
A temperature-independent current source ckt as the image shown. What's the operation of this ckt ? The M5-M7 and R3 make up of the start-up ckt, but why it still be on after power up stage ? The temperature sweep simulation resulst show the deviration of output current is smaller than that without M5-M7 and R3. Icq1 is VEB/R1, which de
Does anyone have pspice full version? if so can u plz execute this file and post o/p is comin at V(8 ). I don't have Pspice *analog multiplier Vcc A 0 15V Vee 0 B 15V V1 1 0 dc 1V V2 4 0 dc 1V R1 1 2 1k R2 4 5 1k R3 3 6 1k R4 7 8 1k R5 8 0 1k D1 6 7 SD51 .model SD51 D(Is=793.4n Rs=3.036m Ikf=8.242 N=1 Xti=0 Eg=1.11 Cjo=4.498n + M
If you have the analogLib: pvcvs2 or ahdlLib multiplier or functional multiplier.
analog voltage/current signals...
Hi, I wish to ask if anyone has a spice model for analog Devices AD834 (500MHz 4 quadrant multiplier) and could share with me? Thank you very much. twomilimeter