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

Give the alternate functions for the port pins of port3, Give the alternate...

Give the alternate functions for the port pins of port3? RD - Read data control output. WR - Write data control output. T1 - Timer / Counter1 external input or test pin.

Compare with memory, Compare with memory The contents  of the memory...

Compare with memory The contents  of the memory  of the memory  location  pointed by HL  register pair are compared with the  contents of the accumulator. The  instruction f

What is the difference between near call and far call, What is the differen...

What is the difference between near call and far call? The PROC directive specifies the start of a procedure, should also be followed along with a NEAR or FAR. A NEAR procedure

Astigmation control, Astigmation control: In most modern oscilloscopes the...

Astigmation control: In most modern oscilloscopes there is an additional focusing control marked Astigmation . This is used to correct an effect which exactly is analogous to

Distribution - salient features of nep, Distribution: This has been re...

Distribution: This has been recognized as the most critical segment of the electricity business. Here the NEP calls for proper restructuring of distribution utilities for achi

Name the 6 modes of operations of an 8253, Name the 6 modes of operations o...

Name the 6 modes of operations of an 8253 programmable interval timer. Mode 0: interrupt on terminal count Mode 1: hardware re -triggerable one-shot Mode 2: rate generato

Draw a 100 line exchange, Q. Draw a 100 line exchange using two motion sele...

Q. Draw a 100 line exchange using two motion selectors and elucidate, how switching takes place in it. Ans: In a 100 line exchange, every subscriber is assigned a 2 digit

Show maximum power transfer, Q. Show Maximum Power Transfer? In order t...

Q. Show Maximum Power Transfer? In order to investigate the power transfer between a practical source and a load connected to it, let us consider Figure , in which a constant v

Dc link scherbius drive - motor control , DC Link Scherbius Drive This ...

DC Link Scherbius Drive This type of scheme is shown in figure. This circuit  allows both  sub synchronous  and super synchronous speed control. In case  of sub synchronous spe

Determine rms and average value, Determine RMS and average value: Dete...

Determine RMS and average value: Determine RMS and average value of the output of half wave rectifier. Solution The waveform of current, output of the half wave rectif

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