The following link shows how to design a RF transmitter and receiver
http://www.e-dsp.com/how-to-build-y...evice-create-rf-in-your-embedded-application/
My question is will this module transmit and receive analog signal or is it only for square wave signals?
Thanks

 

The link does not work, so we cannot comment on the circuits therein.

 

The link does not work, so we cannot comment on the circuits therein.

The link works fine, anyways here is the schematics

I want to transmit ECG signals via this module is it possible?

 

the chip shown in your post is a microcontroller. Form pin 14 and pin 15 the chip send out and receive serial data. This serial data will be sent to a RF module for RF tranmission to another module not very far from it.

This RF module (See the site again) seems to be very cheap are foundamentally serial TTL input to RF output. With this modules you can use any microcontroller you want.

You can also google for Xbee module which are very efficient.

Alberto

 

Ok fine

This is what I'm basically planning.

First circuit link->http://www.eng.utah.edu/~jnguyen/ecg/bigsch.gif
Second circuit link->http://www.e-dsp.com/wp-content/uploads/2006/03/shematic.gif

1.The first circuit is designed to determine ECG, IN+ & IN- are connected to electrodes.
2.The vout of the first circuit will be connected to IN of the second circuit.
3.Using RLP & TLP 315 I transmit & receive the signal.
4.The output of the receiver will be connected to the audio line in (mic) of the PC, and I have a VB application to display the audio input which should be the required ECG!

WILL THIS SYSTEM WORK?????
In this case is there any Xbee option for receiver and transmitter?

Thanks for the help so far

 

Of course it will not work.
The output of the ECG circuit is an analog signal and the input to the transmitter is computer serial data.

It might work if you feed the analog signal to the ADC of a micro-controller and have a program to analyse it and digitize it. Then the receiver could feed its data to a DAC that feeds the signal to the pc.

I don't think a mic input has a frequency response that goes low enough to receive heart beats.