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Hello All, I would like to know how the mobile knows which frequency(2G/3G/4G) it is using while communicating? for e.g. when i am moving, sometimes mobile shows it is in 3G network and sometimes in 4G Network. so i want to know when mobile network switch from 3G to 4G or vice versa, what really happens inside the mobile (hardware level)?
The picture shows resistive trim networks. I am using a 0.18um CMOS process. How should I choose the NMOS switch size (W/L) for the resistive network 1 and 2 ? What criteria decides the required ON resistance for the NMOS switches ?
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We are developing a neural network capable of detecting faults on the electronics components placed on a PCB just from a photo taken of any PCBA. We are finally in the Alpha version of it: Please feel free to take a look at our site and the current visual inspection tool: the web App[U
I just got some great help on this forum to resolve a logic gate issue, so I thought I would try my luck with what I hope is my last issue. Below may be too much context and you may ant to skip to my "question" at the end. For background, the context is a battery management system for a 200 Ah LiFePO4 marine battery bank. The system has a
Please what is the maximum speed of a user at which 1. GSM can perform and 2.CDMA can perform
Hello everyone, I am from Nishtula Instrument and innovation Pvt Ltd, Bhubaneswar, India. We are going to launch a CAN to CAN to RS232 gateway/converter. This Converter is suitable for 1. Connecting two CAN networks operating at different speeds. 2. It can be used as a repeater. 3. Converting CAN to RS232 (Serial) Protocol or vice versa. 4
Hi, attached is the input circuit of a spectrum analyzer. I want to build a 60dB 1W 50R I/O attenuator which will be connected to the input of the spectrum analyzer. I am confused a bit about the next things: 1. What is the difference between the two attenuation pads, T-pads and Pi-pads? Do Pi-pads shunt the signal to ground and T-pads reflect it
Hi, I have a transmitter board which senses the pressure and outputs 4 to 20mA. The board is mounted in a aluminium enclosure using the Stainless steel standoff. The screws used are Stainless steel. Normally, the board is working good and provides 4 to 20mA based on the input pressure. But when I touch the aluminium enclosure, the output cur
Hi all, I am now designing an output matching network for a PA operating at 5.8 GHz using microstrip lines on a Roger 4350 substrate. In the schematic and EM models, the insertion loss of this network is relatively high (around 0.5 dB in EM model), this should result in significant reduction of output power and efficiency of PA (please see the f
I want to design LNA from 12-18 GHz. I want to get s11 and s22 less than -10 dB. Which are the best topologies for obtaining broad band LNA from 12-18 GHz. Can you guide to obtain S11 and S22 less than -10 dB from 12 to 18 GHz.
Hello, as in title "Has anybody tried to run Keras or "Tensor flow" frameworks on FPGAs. I don't ask for runing trained ANN on FPGAs, but I rather asking about running neural networks in training phase. I hadn't eficient Nvidia GPU which is handle CUDA, so I cannot run KERAS on GPU, hence my question about running it on FPGAs. Maybe somebody
I have formally verified a round-robin arbiter code Could anyone advise about the various methods of minimizing the combinational delay tcomb penalty mentioned at the end of section 2.3 of Efficient microarchitecture for network-on-chip routers ? [B
In Ethernet networks, the MAC layer is the first layer to detect the destination address of the received message. my questions: is that means that the transceiver shall take a copy of each message on the bus and forward it to the MAC layer who will decide to accept that message or discard it? If so, this means that the MAC layer must have a very
In distributed amplifiers, is it the total input capacitance of the gain stage or just the Cgs of the input transistor that gets absorbed into the artificial transmission line?What do you mean by “the artificial transmission line” ?
Hi, In this video ( ) he says he used curve fitting for input matching. I came to know for broadband matching I should deal with impedance curves rather than points. Could anyone elaborate the idea of curve fitting for input and output matching and also how to synthesize the matching networks that fit th
Hi, I'm working on an assignment :The ancillary datatypes needs to extracted and inserted in fpga logic over IP networks. The video format is 3G-SDI. I've searched some papers:- file:///C:/Users/Yash%20Jain/Downloads/Multiplexer_HDSD_draft%20(1).pdf
Hi, I was reading the paper "Design Methodology for distributed Power Amplifier in Software -Defined Radio Applications" and came across "Once the characteristic impedances values are fixed, design can be completed by synthesizing the pi/2 transmission lines using lumped components and embedding the devices". I know how to make a tr
I saw the equation for inductance of the artificial lineThis is not transmission line. This is a cascaded connection of constant K section(L/2, C/2). As per equation 1 in the below figure, I think the Lb equation should not have /2 in equation (2). Coul
Hi, In Microwave engineering by Pozar, for constant K-filters it was said that Zi1 = input impedance at port 1 when port 2 is terminated with Zi2 . I would like to it also true that the input impedance at port 1 is Zi2 if the port 2 is terminated with Zi1? 2.How to make the input impedance looking into port 1 is