Monolithic/Hybrid Analog To Digital (A/D) Converter

john July 6, 2011 8 Comments
The basic ANALOG TO DIGITAL (A/D) CONVERTER CIRCUIT has already been explained in an earlier post. Apart from it, there are also many types of monolithic analog to digital converters, such as the integrating A/D, integrating A/D with three-stage outputs, and the tracking A/D with latched outputs. In addition to this, the outputs of A/D are coded in straight binary, binary-coded decimal (BCD), complementary binary (l’s or 2’s), sign-magnitude binary, and so on. The figure below illustrates an 8-bit...
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Analog to Digital Converters (A/D)

john June 24, 2011 6 Comments
This type of converter is used to convert analog voltage to its corresponding digital output. The function of the analog to digital converter is exactly opposite to that of a DIGITAL TO ANALOG CONVERTER. Like a D/A converter, an A/D converter is also specified as 8, 10, 12 or 16 bit. Though there are many types of A/D converters, we will be discussing only about the successive approximation type. Successive Approximation Type Analog to Digital Converter A successive approximation...
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Monolithic/Hybrid Digital to Analog Converters

john June 23, 2011 5 Comments
Earlier, I had explained two DIGITAL TO ANALOG CONVERTERS. Both of them have been designed for four inputs. But, if the number of inputs is more than four, the combination of output becomes more than 16. This makes the circuit more complex and the accuracy of the circuit reduces. Therefore, in critical and complex applications, a monolithic/hybrid D/A converter IC must be used. With the help of binary-weighted resistor, and R  and 2R resistor methods, 8-bit,10-bit, 12-bit, 14-bit, and...
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Digital to Analog Converters (D/A)

john August 10, 2017 15 Comments
A D/A Converter is used when the binary output from a digital system is to be converted into its equivalent analog voltage or current. The binary output will be a sequence of 1’s and 0’s. Thus they ma be difficult to follow. But, a D/A converter help the user to interpret easily. Basically, a D/A converter have an op-amp. It can be classified into 2 types. They are 1. Digital to Analog Converter using Binary-Weighted Resistors A D/A converter...
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Voltage Level Detector Circuit

john June 9, 2011 7 Comments
This circuit is designed and submitted by Mr. Rakesh Bute. We are really thankful for his contribution. The circuit as explained by Rakesh: The design came from the interest of finding a new technique of analog to digital conversion. The two types of ADC (Analog to Digital Converter) that inspired me in the development of this circuit are Flash Type ADC and Successive Approximation Type ADC.  The Flash Type ADC is the fastest ADC available in the market (highest...
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Frequency to voltage converter

admin March 16, 2011 15 Comments
Frequency to Voltage converter circuit based on TC9400 IC. Description. A very simple and low cost frequency to voltage converter based on the TC9400 IC from Microchip is shown here. TC9400 can be either wired as a voltage to frequency converter or frequency to voltage converter and it requires minimum external components. The functional blocks inside the TC9400 includes integrator opamp, 3uS delay circuit, one shot circuit, charge discharge control circuit, divide by 2 network and necessary drivers. This...
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Frequency to voltage converter using LM331

jacky August 13, 2017 32 Comments
Making a frequency to voltage converter – All you need to know Description LM331 is basically a precision voltage to frequency converter from National Semiconductors. The IC has a hand full of applications like analog to digital conversion, long term integration, voltage to frequency conversion, frequency to voltage conversion. Wide dynamic range and excellent linearity make the IC well suitable for the applications mentioned above. Here the LM331 is wired as a frequency to voltage converter which converts the...
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Speaker to microphone converter circuit

john April 7, 2010 11 Comments
Description. This circuit is a simple approach for converting a loud speaker into a microphone. When the sound waves fall on the diaphragm of a speaker, there will be fluctuations in the coil and there will be a small proportional induced voltage. Usually this induced voltage is very low in magnitude and useless. Here in the circuit the low voltage is amplified using transistors to produce a reasonable output. The transistor Q1 is wired in common base mode and...
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Converting CD-ROM drive to audio CD player

admin March 8, 2012 7 Comments
Description. Here is the simplest scheme for converting a CD ROM drive of your computer to a Audio CD player. The minimum requirement for the player is that, it should have a audio output and skip button. Luckily most of the CD ROM’s are equipped with both of these.  The CD ROM drive needs two voltages, 12V & 5V for its operation. So the main objective is to build a suitable power supply for the CD ROM drive. The...
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Light to Frequency converter circuit

jacky February 28, 2011 1 Comment
A simple Light to Frequency Converter Introduction. Here is the circuit diagram of a effective light to frequency converter circuit that can be used for variety of applications such as light intensity measurement,fun etc. The circuit is based on TLC555, the CMOS version of famous timer IC NE 555. A photo diode is used for sensing the light intensity.The timer IC is wired in astable mode.The leakage current of the reverse biased photo diode is proportional to the light...
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