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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21 views

Question about IC regulators [on hold]

I have a basic question about IC regulators that I know someone here can answer. Basically if I had an IC 7812 regulator in a circuit that has an input voltage of 14 volts, would the output voltage be ...
0
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13 views

Discrete MOSFET driver control IC

I am building a Marx bank, which consists of multiple MOSFETs connected in parallel when charging and in series when discharging. I have each stage of the pulse generator designed, including isolated ...
0
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0answers
20 views

How to preserve MSL 3 devices

I have bunch of ICs that is rated MSL3 that came in a moisture barrier bag. For an urgent work, I needed to open the package to use one device. Could anyone tell me how I should preserve rest of the ...
0
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2answers
38 views

Choosing resistor values for a 555 timer

I have to design a frequency counter using a 555 timer as a pulse generator. I included a schematic for part of the circuit, but this is my first time using a 555, so I also included the original ...
1
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2answers
54 views

Reverse biased capacitor on IC input pin

I am looking at the test circuits on the data sheet for the AN6884 VU meter IC, and I cannot understand the connection to pin 8 in the following diagram: Pin 8 accepts a positive input voltage. The ...
1
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1answer
137 views

What is meant by output Leakage Current?

Is output Leakage Current= Output Current - Input Current? I encountered the term in a datasheet of the L9938 driver.
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0answers
60 views

3v3, 12v Smps: “Design ok!” “Pcb ok!” Why not stable? Please Help

Im working on a project and i need 3v3,5v and 12V in this. I though smps circuits would be better than Linear Regulators. So i choose LM2676-adj IC. I designed schemetics for 3V3-3A SMPS and 12V-3A ...
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1answer
39 views

Equivalent of IR2155

I build a circuit based on IR2155, but it's not so readily available in my area. Is there an equivalent IC for IR2155?
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1answer
61 views

Bypass IC output to give an LED a voltage boost

I'm attempting to modify a circuit in an existing device, the relevant part of which looks like this: The IC controls the LED brightness, as well as having connections to other things. I have ...
2
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1answer
64 views

Is there relation between logic chip names and their internal structure

I know that for instance an ATMega328 is a 8 bit MCU with 32k of program space, the same can be said for most other MCUs and some other ICs with a direct relation between the name and internal specs. ...
0
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1answer
42 views

Undefined part of CSR8645 chip

I am trying to build a bluetooth audio headset and decided to use CSR8645 chip, but while trying to understand diagram of this chip i couldn't identify one part of it. I am uploading picture ...
0
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1answer
70 views

Monolithic and Hybrid Integrated circuits

I was told by my professor that ICs can be of two types, monolithic and hybrid and then she went on to explain technologies of fabrication. What is the difference between a monolithic IC and a hybrid ...
1
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1answer
211 views

What are Vcc and GND on a shift register?

What are Vcc and GND on a shift register? I thought that I had to provide a positive voltage to the IC via the Vcc, but turns out that I can operate my shift register without powering the Vcc. ...
4
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1answer
566 views

What's this component?

What is this component?(U6) Source
2
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1answer
97 views

Simplifying CMOS schematic to reduce number of transistors

I know the basics in creating a schematic in CMOS, wherein in a(n inverted) boolean expression, if there is a: NOR - NMOS should be in parallel, PMOS in series; NAND - NMOS in series, PMOS in ...
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1answer
32 views

Can you use a SPST to turn on and off two power sources?

I have several batteries in series and the ground point is in the center, such that I can achieve a negative and positive voltage. The OP amp uses both negative and positive voltage. Let's assume I am ...
2
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4answers
103 views

How do current limiting resistors work between ICs?

In a simple battery+resistor circuit with a fixed voltage, the resistance of a series resistor determines the current flowing through it. But what happens if this resistor is placed between two ICs? ...
2
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2answers
237 views

Understanding the Texas Instruments CD4075 datasheet table

I downloaded the CD4075 IC datasheet and I'm having trouble understanding the lines labelled "Output High (Source) Current" in the table below. The table shows current values relative to temperature ...
0
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0answers
36 views

Receiver effciency when using DFLL instead of PLL

I have a small doubt! How tolerant are industrial standard receiver chip to phase and frequency error. I bring it out because while designing a transmitter, I want to use DFLL instead of PLL to reduce ...
1
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1answer
54 views

adjust clock frequency using Timing Error Avoidance Technique

I am following the next example as is depicted on the diagram, in order to adjust the clock frequency of a multiplier to its maximum. The System works as follows: The flip-flop at the input to the ...
1
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1answer
48 views

Connecting analog power domains in the same chip in ICs (Integrated Circuits)

I have a following issue, which I didn't see in IC books: I would like to know if it is possible to send analog signals (sin waves) between two power domains in an integrated circuit. The issue looks ...
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2answers
42 views

looking for a smart way to compare DCDC Converter IC [closed]

I'm looking for a quick and easy way to compare DCDC boost Converter IC, to all or most manufacturers. Does anyone know tools, sheets or charts? Thanks!
0
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1answer
52 views

falling delay inverters VLSI CMOS

How do I obtain the falling delay driving by signal A: Data: ...
0
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0answers
29 views

Help with harder version of carry chain adder?

I am designing an addr circuit given cin = 0, given a nand of the operands i want to add, their xor, and nor. I have drawn it in a software but i am not getting the right output, i have tried to ...
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2answers
97 views

Identifying two 6 pin SMD packages

I need some help identifying these 2 SMD parts. One says .3Ft and the other says .1Ft. They each have 6 pins. They are found ...
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1answer
65 views

can I charge Mobile battery using mobile charger directly?

I want to charge mobile battery of 3.7 v directly by connecting 2 terminals of charger(5 v output) to two terminals of battery. My questions are Is IT POSSIBLE? what must be voltage adjusted to ...
0
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1answer
38 views

How should this code look like in verilog?

I am designing an ALU to add at state 000, I have to assign control signals for a mux, carry in, and operands so that it works. so, i wrote an if statement in the controller module, and the TA told me ...
2
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0answers
55 views

What could this PLA be doing?

The picture below shows a PLA, I have done part (a) and found out that; F0 = A0 xor B0 F1 = A0B0 + (A0' + B0')(A1 xor B1) F2 = A0B0(A1 + B1) + A1B1 What may this circuit be doing, I can't see a ...
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1answer
56 views

Why are the charge and discharge rate of Lihium Polymer Batteries different?

I have a 3S 1.3MAH Lithium Polymer battery with a 25C discharge rate, and a 5C charge rate.From what i know, the discharge rate is the rate at which the battery can be safely ischarged( i.e how many ...
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2answers
116 views

what stops manufacturers from making hardware optimised game engines

Just like the mp3 and h264 have been made into a circuit, what is stopping graphics card manufacturers from building a game engine (the program that most often runs on a graphics card)into the ...
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2answers
64 views

IC for 4 Kbytes of RAM [closed]

Is there a Memory IC for 4Kbytes of RAM? I'm trying to make a schematic capture in Proteus and I need a Memory IC for 4Kbytes of RAM, I've searched throughout the library and I can't find one, tried ...
0
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0answers
35 views

Energy Monitor IC with built in Hall Sensor

I have looked at a couple of IC's which provide energy measurement(real power,apparent power), however these need to interfaced to a current transformer or a hall effect sensor since they cannot ...
21
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7answers
5k views

Why do microcontrollers have so little RAM?

Maybe this is more of a perceptional problem, but it seems like microcontrollers have advanced by leaps and bounds in the last 20 years, in almost all regards, higher clock speed, more peripherals, ...
0
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1answer
36 views

What is the name of the IC that runs a low-harmonic power supply?

I'm interested in building an AC/DC converter for low-harmonic applications. Single-phase AC input, followed by a rectifier and a PWM-controlled boost converter. I know there are ICs which are ...
0
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1answer
59 views

How do you store A or B in a RAM of a CPU datapath?

I have an assignment to make a CPU, but am confused with how f_left and f_right are going to be used. I think they are to store ...
0
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1answer
114 views

Microcontroller freezes (or doesn't) when plugged into different outlets in my home

I have an ARM development board (Marvell ARMADA XP CPU) and depending on which plug outlet I plug the system into, the system will freeze up after a few minutes or not. I found that plug outlets in ...
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0answers
36 views

Does any module exist with two separate PIR sensors?

I would like to use two separate sensors to detect a range of situations. subject from the right, subject from the left, from the middle (dual trigger), ignore one side, determine length of ...
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2answers
149 views

Where can I find common circuitry implementations of different computer system components?

Mostly out of interest, I'm trying to understand common circuit-level implementations of computer components. I understand that implementations may differ widely, but I'd like to see examples. It ...
0
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0answers
53 views

Capacitor node voltage problem

What might be the reason why the voltage on the other terminal of the auxiliary capacitor C7 and C8 connected with CKPb and CKP, respectively gets lower than its input? (i.e. input 1.7849V => output ...
0
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1answer
110 views

Suggestions for in-house PCB/FPC lab? [closed]

We are a hardware startup based out of Greece, looking for in-house PCB/FPC fabing solutions/equipment. LPKF's ProtoLaser U3/S look great but they cost $140K and $70K (if I'm not mistaken) ...
4
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1answer
227 views

Integrated LED + Resistor + Transistor

Most designers when are controlling an LED have to make the same old circuit of Vcc -> Resistor -> LED -> Transistor (you need the transistor in case your ...
2
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4answers
236 views

ICs Powering On With Random Values

I've been prototyping a circuit for a first year university engineering project and I've been running into some problems with one section of the circuit that has really stumped me. Basically the flip ...
0
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1answer
45 views

What is this part (label is 23LCVB I/P JWD 1336, 8-DIP package)?

I found this part in a box with random parts. Mostly they were voltage regulators, opamps and transistors (both BJT and FET). The closest match I found was this SPI SRAM, but the part number didn’t ...
8
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3answers
1k views

How are crossing lines implemented on microchips?

I always imagined the photolithographic microchip manufacturing to be a 2D layer creation process without layering, thus creating a topological problem for circuitry when you have some \$K_{3,3}\$ or ...
0
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1answer
41 views

Online resource for lithography/micro fabrication [closed]

I am looking for good compiled resources on microfabrication (photolithography, ion etch, etc) for making integrated circuits. Some background: I do some work in a cleanroom user facility making ...
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1answer
42 views

Circuit simulation problem dealing with transistor operation

Simulating the circuit below (PMOS charge pump; doubles the input supply), all the transistors are operating in cutoff region when I extracted the .dp0 file. What might this means? I'm using SYNOPSYS ...
0
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1answer
60 views

Controlling high rating DC motor

In a robot, I need to use a (24 volts 5-7 amp) DC motor, which should be controlled by a microcontroller. Now, will I get a motor driver IC for such a motor? If not, what kind of circuit will help? I ...
1
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1answer
73 views

NAND gate LVS problems in Cadence Virtuoso

I don't know why my layout won't pass LVS. I am constructing a NAND gate, and it looks like I have all connections in the schematic and layout fine, but I can't get it to say success. What could be ...
1
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1answer
109 views

Sequential circuit with more than 10 LEDs

I need to build a sequential LED circuit that will have more than 10 LEDs in a sequence. The LEDs should blink only one at a time. I know I can do 10 LEDs with a 4017 decade counter easily, but I dont ...
2
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1answer
53 views

Op Amp high voltage output

Is it possible to output voltages in the range of kilovolts and current of atleast >1mA using an input of <10V on a consumer electronics op amp such as IC 741? If not, then why?