Jan 6, 2005 #1 W Wrigley Newbie level 4 Joined Oct 27, 2004 Messages 5 Helped 0 Reputation 0 Reaction score 0 Trophy points 1,281 Activity points 62 Rf receiver I'm working on a simple receiver circuit. Just to receiver a 27MHz signal to drive a motor. This is how the circuit goes.. Tuned circuit ----> Amplifier ----> halfwave rectifier ---> transistor as a switch to drive the motor When i only tested the motor circuit itself... just using a 3V battery to run it... it doesn't... but when i use power supply of only 2.18V it runs... anybody can explain? because of its current?
Rf receiver I'm working on a simple receiver circuit. Just to receiver a 27MHz signal to drive a motor. This is how the circuit goes.. Tuned circuit ----> Amplifier ----> halfwave rectifier ---> transistor as a switch to drive the motor When i only tested the motor circuit itself... just using a 3V battery to run it... it doesn't... but when i use power supply of only 2.18V it runs... anybody can explain? because of its current?
Jan 7, 2005 #2 V vfone Advanced Member level 6 Joined Oct 10, 2001 Messages 5,719 Helped 1,617 Reputation 3,239 Reaction score 1,251 Trophy points 1,393 Activity points 36,323 Re: Rf receiver Could be related to the bias of your amplifier. Try to tune the idle bias of the amplifier for different supply voltages until is working, for the DC range that you are interested.
Re: Rf receiver Could be related to the bias of your amplifier. Try to tune the idle bias of the amplifier for different supply voltages until is working, for the DC range that you are interested.
Jan 8, 2005 #3 S springf2000 Full Member level 6 Joined Jun 13, 2004 Messages 381 Helped 20 Reputation 40 Reaction score 2 Trophy points 1,298 Activity points 2,500 Re: Rf receiver power supply can provide more current,more power, can the battery provide current enough,so y should test your circuit how much current it need!
Re: Rf receiver power supply can provide more current,more power, can the battery provide current enough,so y should test your circuit how much current it need!