System diagram of complex programmable logic device, Electrical Engineering

Assignment Help:

The system diagram for the proposed unit is shown below.

448_System diagram of Complex programmable logic device.png


The system operates on the principle of Time to Rate Conversion. Signals from the heart beat sensor are amplified and level shifted by the Signal Conditioning unit to produce a digital waveform characterised by a fixed pulse width (10 ms) and a period (T1) that varies in inverse proportion to the heart rate. That is to say as the heart rate increases the period decreases and vice versa.

The Digital Pre-processing unit samples T1 on this waveform to produce a 12 bit count that again is inversely proportional to the heart rate.

The Analogue Signal Processing unit converts this 12 bit count to a waveform with a variable pulse width (T2) which is now directly proportional to the heart rate.This is typically accomplished by feeding the count to a digital to analogue converter, using the converter output to charge an op amp configured as an integrator and using this output to reset a monostable. Thus the larger the count the quicker the integrator will reach the reset voltage and the shorter will be the monostable pulse.

The Digital Post-processing unit samples T2 on this waveform and converts to a 3 digit number that directly represents the heart rate in beats per minute suitable for output on seven segment displays.


Related Discussions:- System diagram of complex programmable logic device

Discuss need of caches, Discuss need of Caches. Caches are other big t...

Discuss need of Caches. Caches are other big thing done in the last 2 decades to enhance performance. Keep things locally when they are going to be used soon. By a physics vie

The time constant of the field winding, The field winding of a 200 V d.c. m...

The field winding of a 200 V d.c. machine has a resistance of 20? and an inductance of 500mH. Calculate: (a)  The time constant of the field winding (b)  The value of curr

Describe the process control instructions, Describe the process control ins...

Describe the process control instructions STC - It sets the carry flag & does not affect any other flag  CLC - it resets the carry flag to zero &does not affect any other fl

Explain how memory paging is used for memory addressing, Explain how memory...

Explain how memory paging is used for memory addressing. The memory paging mechanism placed inside the 80386 and above permits any physical memory location to be assigned to se

What is direct memory access, What is Direct memory access? Direct memo...

What is Direct memory access? Direct memory access (DMA) is a process wherein an external device takes over the control of system bus by the CPU.DMA is for high-speed data tran

Bode plot phase ad gain margin, Using Bode plot calculate (a) Phase margin ...

Using Bode plot calculate (a) Phase margin (b) Gain margin (c) Stability of closed loop system. The open transfer function of the system is t=30/(s+2)/(s+3)Using Bode plot calcula

List out the five categories of the 8085 instructions, List out the five ca...

List out the five categories of the 8085 instructions. Give examples of the instructions for each group. 1.  Data transfer group - MOV, MVI, LXI. 2.  Arithmetic group - ADD,

Program description , Program Description In the above  program  any t...

Program Description In the above  program  any two  numbers can be stored in register A and B ( by  replacing XX  and YY). Contents  of B are  compared with A. If  B CY = 0

Sketch a graph comparing the fcc class, a) In the United States, the Federa...

a) In the United States, the Federal Communications Commission (FCC) is charged with the regulation of radio and wire communication (FCC part 15). It basically sets limits on the

The initial discharge current, A 0.1µF capacitor is charged to 200 V before...

A 0.1µF capacitor is charged to 200 V before being connected across a 4 kΩ resistor. Determine: (a)  The initial discharge current (b)  The time constant of the circuit

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