Describe the operation of voltage to frequency ADC, Computer Engineering

Assignment Help:

Describe the operation of voltage to frequency ADC.

Ans:

A voltage-to-frequency converter i.e. VFC is an oscillator that frequency is linearly proportional to a control voltage. The voltage-to-frequency converter A to D Convertor is monotonic and free of missing codes, integrates noise and can consume extremely little power.

The current-steering multivibrator voltage-to-frequency converter is in fact a current to-frequency converter quite than a VFC, but, as demonstrated in Figure below, practical circuits invariably have a voltage to-current converter at the input.

The principle of operation is evident: the current discharges the capacitor till a threshold is reached, and while the capacitor terminals are reversed, the half cycle repeats by itself. The waveform across the capacitor is a linear triangular wave, although the waveform on either terminal regarding ground is the more complicated waveform shown.

1923_voltage to frequency ADC.png

Truth Table

A3

A2

A1

A0

d6

d5

d4

d3

d2

d1

d0

|

x

-

-

-

-

-

-

-

-

-

-

-

---

-

0

0

0

-

-

-

-

-

-

-

0

|

0

0

0

0

-

-

-

-

-

-

-

1

|

1

0

0

1

-

-

-

-

-

-

0

-

|

0

0

0

1

-

-

-

-

-

-

1

-

|

1

0

1

0

-

-

-

-

-

0

-

-

|

0

0

1

0

-

-

-

-

-

1

-

-

|

1

0

1

1

-

-

-

-

0

-

-

-

|

0

0

1

1

-

-

-

-

1

-

-

-

|

1

1

0

0

-

-

-

0

-

-

-

-

|

0

1

0

0

-

-

-

1

-

-

-

-

|

1

1

0

1

-

-

0

-

-

-

-

-

|

0

1

0

1

-

-

1

-

-

-

-

-

|

1

1

1

0

-

0

-

-

-

-

-

-

|

0

1

1

0

-

1

-

-

-

-

-

-

|

1

 


Related Discussions:- Describe the operation of voltage to frequency ADC

What are user threads, What are User threads   User threads are support...

What are User threads   User threads are supported above the kernel and are executed by a thread library at the user level. Thread creation & scheduling are done in the user sp

Define TII, TII stands for? Ans. TII stands for Table of incomplete ins...

TII stands for? Ans. TII stands for Table of incomplete instructions.

Function of osi transport layer, Q. Function of OSI Transport Layer? - ...

Q. Function of OSI Transport Layer? - It takes the information to be sent as well as breaks it into individual packets that are sent and reassembled into a complete message by

What are the issues of software development, What are the issues of softwar...

What are the issues of software development One of main issues in software development today is quality. Software must be properly documented and implemented. The notion of sof

Explain scientific applications and image processing, Scientific Applicatio...

Scientific Applications/Image processing Major of concurrent processing applications from science and other academic disciplines, are mostly have based on numerical simulations

Define von neumann architecture, Von Neumann architecture was first majoran...

Von Neumann architecture was first majoranticipated structure for general-purpose computer. However before consideringmain components of von Neumann architecture let us first elabo

High level expertise, The most useful feature of an expert system is the h...

The most useful feature of an expert system is the high level expertise it provides to aid in problem solving. This expertise can represent the best thinking of the top

Draw and illustrate the block diagram of DMA controller, Draw and illustrat...

Draw and illustrate the block diagram of DMA controller. Also discuss the various modes in which DMAC works. Direct memory access (DMA) is a process in that an external device

Why do we need dma, Why do we need DMA? DMA is used to transfer the blo...

Why do we need DMA? DMA is used to transfer the block of data directly among an external device and the main memory without the continuous intervention by the processor.

How can we decrement and increment operations, How can we decrement and in...

How can we decrement and increment  operations We  can  implement decrement  and increment  operations  by  using  a  combinational circuit  or  binary  down/up counters.  In

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd