Hello GUYS,
Im in a big problem. Im working at 433MHz requency range. yesterday I was testing my circuit. I gave a dummy signal of 30MHz and 2Vp-p at the input of a peak detector. using the circuit shown in this link http://www.arrl.org/tis/info/pdf/0706060.pdf
I have kept the value of the resistor as 50ohm and the diode Im using is DO7 from farnell that has a voltage drop of 0.4v. The problem is the signal that comes out of the peak detector is only in the range of 700 to 800mv as it detects the peak voltage only. but this magnitude of voltage is not sufficient to trigger the 555 timer circuit that is there. As the timer circuit needs one-third of Vcc which is approx 1.6v.
COULD YOU PLEASE HELP ME WITH THIS....HOW DO I END UP INCREASING THE VOLTAGE THAT IS COMMING OUT OF THE PEAK DETECTOR SO THAT I CAN TRIGER THE 555TIMER. CAN I USE LM741 AS A VOLTAGE AMPLIFIER. PLEASE HELP ITS VERY URGENT.
THANKS
DIWAKAR
Im in a big problem. Im working at 433MHz requency range. yesterday I was testing my circuit. I gave a dummy signal of 30MHz and 2Vp-p at the input of a peak detector. using the circuit shown in this link http://www.arrl.org/tis/info/pdf/0706060.pdf
I have kept the value of the resistor as 50ohm and the diode Im using is DO7 from farnell that has a voltage drop of 0.4v. The problem is the signal that comes out of the peak detector is only in the range of 700 to 800mv as it detects the peak voltage only. but this magnitude of voltage is not sufficient to trigger the 555 timer circuit that is there. As the timer circuit needs one-third of Vcc which is approx 1.6v.
COULD YOU PLEASE HELP ME WITH THIS....HOW DO I END UP INCREASING THE VOLTAGE THAT IS COMMING OUT OF THE PEAK DETECTOR SO THAT I CAN TRIGER THE 555TIMER. CAN I USE LM741 AS A VOLTAGE AMPLIFIER. PLEASE HELP ITS VERY URGENT.
THANKS
DIWAKAR