Questions tagged [integrated-circuit]

An integrated circuit (IC) is an electronic circuit built onto a single plate of a semiconductor material, normally silicon. Modern ICs may contain billions of transistors and they have played a major part in the miniaturization and performance improvements of modern electronic systems.

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38 views

Debug Bricked Standing Desk IC Board Issue

I have an Apex electric adjustable desk Flex I bought in 2017 that got bricked out of the blue while I was raising it up this morning. I tried performing a reset by holding the down button for 10 ...
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Inverting opamp amplifier

The gain of an ideal opamp is considered infinite and Vout=K(V+ - V-). where V+ is the non-inverting input and V- is the inverting input. The output voltage in the case of an inverting opamp amplifier ...
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Generating random bits using two oscillators and a D Flip-Flop

I'm an electronic musician and computer science student I have been tinkering a lot lately with Arduino and analog ways of sound synthesis. Mainly I've been using 4093 ICs (NAND gates) to make ...
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What does “strap” mean in low-level hardware programming?

I see the word "strap" in some low-level hardware programming document from time to time. For example: ...to check if these straps are consistently programmed... if not then firmware re-...
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2answers
30 views

Best way to control AL8871Q dimming without microcontroller?

Am new to electronics and am planning to use the Diodes AL8871Q to drive a Cree XHP50/70 at 6V 4.8A. Planing to have the driver as small as possible. Looking at the data sheet, I can control the ...
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What is the equation for “beff”, i.e., “Gain Factor in Saturation” in BSIM4?

Using the device parameter list in Cadence, I found out that ID follows this equation exactly: ID = 1/2 * beff * vgt**2 I also found out that ...
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Designing differerntial Sigal modulator

I would like your suggestion on my first design Differential signal modulator [simulation attached]. Before jumping into design let me highlight my objective. I am differentiating a control signal of ...
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1answer
106 views

How does this dice rolling circuit work? [closed]

I'm having trouble understanding how this whole circuit works. I am just a beginner trying to challenge myself but I can't seem to be able to.
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168 views

Why does decreasing the voltage also decrease the circuit frequency?

In CMOS circuit design, we know dynamic power is propotional to \$V_{dd}^2Cf\$, so the best way to reduce dynamic power is to reduce Vdd. However, according to the textbook, Keeping the same clock ...
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How do you store ICs used in hobby electronics?

I've recently started working on a project and I need to find a way to store some ICs that I'm using. I have around five different ICs and someone said I could just put them all together in a small ...
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Common-Source Stage with Diode-Connected Load

I have a question about the small-signal gain in a common-source stage with diode connected load. I understand there are multiple equations for gm and the one you use depends on what relationship you ...
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Where is the flash memory for this IP camera board?

I just opened an Escam IP camera and this is the main board. You can see the HI3516 SoC + H5TQ1G63EFR RAM + that thing with adhesive that in the second photo I took off and you can see it's a ...
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How can I make cyclic 4 min. delay circuit that works on 5VDC

I have a automatic liquid drip project, which works based on timing. Basically there are three manual switches and each switches will select different delays such as 2 min., 3 min. and 4 min. When ...
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Cascode MOSFET Vds

Hi, I am having some difficulty understanding the statement underlined. How does M2 see Vb-Vth2 across its drain source?
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Multi-Stage Common-Source Amplifier - When is it no longer a small-signal?

I have a question about the actual definition of a small-signal signal. We use it all the times in amplifiers. But how small is a small-signal? When does it stop becoming a small-signal? Take for ...
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Use of a DC power supply and an arbitrary wave generator in digital circuits

I am a communications and electronics engineering student from home because of obvious reasons, i´ve mannaged to acquire a regulated DC power supply an arbitrary wave generator and a mini oscilloscope ...
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Industry Standard for Memory Address Decoder Design

I am currently designing the address decoder of a piece of ReRAM that will be sent to TSMC and manufactured. I have studied in class and textbook that there are two common address decoder designs. One ...
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61 views

Multiple Direct Digital Synthesizers (DDS) to Increase Sample Rate

I’m looking to generate a RF signal sampled at around 10 GSPS operating above the 3GHz mark. In order to maximize data throughput, the signal will be modulated at that frequency (rather than mixing in ...
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1answer
62 views

Opto-isolator/ optocoupler for electric isolation in IC design

I came across while reading the opto-isolator technique used for electric isolation in embedded systems/ Integrated Circuits design that " Opto-isolator is not recommended for electric isolation ...
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72 views

How to use this 12-bit ADC chip

I have a technical question asking how to use this IC in my application. I am converting 0 to 5Vdc from a potentiometer to a 12-bit digital representation using a 12-bit parallel output ADC IC. This ...
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What is the (typical) value of SPICE parameter ISS for a (vertical) npn transistor?

SPICE gives a default value for the (collector) substrate leakage saturation current ISS. The default is ISS=0 but I would like to know the real value for an integrated vertical npn transistor. The ...
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28 views

74LS47/74LS247 BI/RBO-pin usage

I am currently playing around with a 74LS247 BCD to 7 segment decoder. The basic usage for decoding works perfectly fine. But I would like to test out everything this IC has to offer including the ...
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10 views

Integrated battery charger for simulation in proteus 8

I am looking for a library that has an integrated that has the battery charger functionality (MCP73831, MCP73833) to simulate it in proteus 8. Supposedly there is a library for proteus of this ...
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49 views

Radio button not working [closed]

The on/off button of my radio is not working. Pushing the button (on top of the board) has no effect. Short-circuiting the two solder pads (in the red oval) does turn the radio on and off. What ...
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39 views

74HC377 Octal D flip-flops latching on falling edge of clock

What would cause a 74hc377 octal D flip-flops to occasionally latch on the falling edge of a clock? I have several different 74hc chips across several breadboards. I was daisy chaining the breadboard'...
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I am searching for the datasheet of the TA7634AP

I am unable to locate the datasheet for the Toshiba TA7634AP. This is an IC from an Olivetti M24 monitor from 1986. It should be a horizontal and vertical oscillator meaning that it generates pulses. ...
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SMD electrolytic capacitor identification

Hi! Anyone happen to know what is the capacitance and voltage reading of this capacitor? The print reads 228 PC 330 4 Thanks!
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72 views

Connecting 1.8V USB and PCIe to 3.3V system

I'm working with a google coral module (ASIC) that has both PCIe gen2 1x and USB 2.0. From the datasheet (https://coral.ai/docs/module/datasheet/) the I/O levels are 1.8V maximum. The problem then ...
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17 views

Vdd rise test in real life

I want to simulate VDD rise. For example I want to raise 1.2V VDD to 4-5 Volts for tens of microseconds and lower back to 1.2V. Suppose I have a high rise and fall time pulse generator (200-500 ...
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1answer
46 views

Damaged CMOS-transistor behavior in th IC circuit

) I've always wondered what will happen with CMOS transistor in the IC if it is exposed by over-current or over-voltage? I mean what are the possible outcomes. Will the CMOS be like in short circuit, ...
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21 views

What is the technical term for a hardware message authentication code generator IC?

I am looking for a way to identify devices I build. Basically I am looking for a chip to which I can write a non-recoverable secret and that uses this secret to then "sign" messages I send ...
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41 views

Simulate press on a rubber button infrared remote control with a Raspberry Pi

I'm stuck. I'm trying to use a Raspberry Pi to simulate a button press on an infrared remote control that uses conductive rubber buttons in order to control/automate a toy with Python. Really grateful ...
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65 views

MCP73831 charger - how to control low voltage cell

Does the MCP73831 have a way to set a protection to shut down the main output if the supply voltage is too low? I would like to implement (without coding) a protection which disconnects the cell if ...
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55 views

Over voltage and reverse polarity protection

I was trying to make an over voltage and reverse polarity protection circuit and create a PCB that I can easily use in some of my projects. My level of electronics it's not so good, and that's why I'm ...
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What can cause voltage irregularities across an IC chip?

This is the preamp section of a channel of a tape deck for which one channel is working and one is not. Swapping all the components between the channels does not affect which channel is working ...
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81 views

IC for a 10nA Current Mirror

My laboratory developed an IC, where it will be necessary to have an external 10nA current source to supply it, with an accuracy of <5% and output resistance in the order of 5M ohms or higher. It ...
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44 views

digital feedback stability

Good evening. i confused to extract the transfer function of the following loop, (shown below) where Cin is a switch cap operated by feedback Fout and Cx switch cap is operated by an external Fref = ...
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Help identify “0GSV” or “OGSV” SMD Integrated Circuit

This IC is part of a malfunctioning LCD LED backlight control circuit built around the D60A60. Maybe it's a voltage regulator? Couldn't find after many tries. The marking is either OGSV or 0GSV.
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Part Marking ID assistance - 4E30

I'm having trouble figuring out the identity of this QFN-32 packaged component. I can tell you it has a crystal attached so it's some king of embedded device. I doubt it's an FPGA because it also ...
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1answer
253 views

How dense is SRAM compared to random logic?

Modern CPUs always have some on-chip cache, typically more than one level. This takes a lot of die area; static RAM is generally reckoned at six transistors per bit. That having been said, the ...
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Help identify 6 pin SMD - top mark MAW - found near BIOS on motherboards and GPUs

I need help to identify a SMD component of 6 pin, without manufacturer. Only mark "MAW". Seems it is commonly used for BIOS circuit on motherboards and GPUs. I need to replace it by a new ...
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54 views

VCO Tuning with MOSCAPs

I'm designing an integrated VCO for use in an FM Radio frequency PLL. In order to reduce the external part count, I had the idea of using MOSCAPs as the frequency tuning element instead of external ...
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1answer
58 views

555 one shot missing a beat

I built a monostable multivibrator circuit with a 7555 chip. It has 1MΩ and 4.7μF components for timing, giving a pulse width of 5.17 seconds. It also has an RC on the trigger with 10kΩ and 0.33μF for ...
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60 views

Pb Free devices

We usually find in datasheets of Integrated circuit in features section the following statement: *Pb free devices, *Halide free device, What is the advantage for an IC to be Pb or Halide free?
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If an IC has an external resistor for timing, can that be replaced with an analog voltage out from another IC?

Specifically, I want to control the sample rate of an ISP1820 with an analog out from an Arduino. I know I could drop-in a digital pot but I don't have one and that seems like needless complexity if I ...
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74 views

Buck converter design review - updated

Last week I asked this question attempting to find a solution to efficiently converting higher voltage to lower voltage. From the answers, I arrived at TI Power Designer and I ended up with this ...
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Integrated Circuit Chip number AUT1020218-A. Does anyone know what this is or where to get one?

A chip number in this device is AUT1020218-A. Does anyone know what it is? I am trying to repair a timer device.
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Figuring out pin 1 on this IC

I have this ic: https://www.ti.com/product/SN74CBT3251 However, if you look at the actual packaging, there is not a circle, in order to figure out pin 1. This is a picture of the IC: Can someone give ...
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149 views

I need to know what the circuit does where there are 4 resistors in parallel, two capacitors and two diodes with cross links

I'd like to know what the circuit in which include 4 resistors, two capacitors and two diodes would do independently from the rest of the circuit if it was connected by itself to a voltage source at ...
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1answer
66 views

CMOS vs TTL power and impedance

I need to compare and contrast a CMOS IC with a TTL IC. I've chosen a quad 2 input NAND gate IC, 7400 for the ttl version and 4011 for the CMOS. I'm having a bit of trouble with 2 of the requirements. ...

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