10 Threads found on edaboard.com: Schematic Transistor Receiver
Hi I have built a regenerative receiver using this schematic it does not work.
If I connect a 10K from the base of the transistor (c3 pin) to the vcc, then I can listen to stations but the controls do not change neither the frequency or the regeneration. I can listen to all band stations a
RF, Microwave, Antennas and Optics :: 06-05-2015 03:00 :: neazoi :: Replies: 11 :: Views: 702
in the following picture, the schematic is a part of an ir receiver, here is a twin-t notch filter and a non-inverting amplifier.
in the notch filter, R is programmable (s), and switch here is nmos transistor (having body effect), when simulation(assuming s=100), in some corner, the leakage current of s is 25nA also, causing a voltage
Analog Circuit Design :: 11-30-2012 08:56 :: lhlbluesky :: Replies: 2 :: Views: 384
you need to put your schematic here or provide some more details regarding your question.
Microcontrollers :: 09-30-2012 01:10 :: Jigar 4 Electronics :: Replies: 2 :: Views: 664
Attached is a schematic that now only resembles the UHF receiver I have been designing. It simulates fine but when placed on a board it required alot of modifications to get working.
Anyway I can inject a signal at the Antennae port at -100dbm and view the signal on the spectrum analyzer after the saw filter at -90dbm. The oscillator wor
RF, Microwave, Antennas and Optics :: 03-01-2012 23:02 :: darcyrandall2004 :: Replies: 2 :: Views: 1347
Show us schematic of transmitter and receiver block
Microcontrollers :: 10-29-2011 15:50 :: kak111 :: Replies: 1 :: Views: 660
I am trying to drive 3 ir leds from an ic using the following schematic :
This seemed to work for a while but at my receiver i am getting a strange offset value as if the transistor cant turn the led's truly off at any time. Any
RF, Microwave, Antennas and Optics :: 06-21-2011 18:28 :: Miltaridis :: Replies: 1 :: Views: 564
The component references are not on the schematic but I think I can see what is going on.
I think it uses a zero, or close to zero IF by running the oscillator very close to the signal frequency then uses a pulse counting detector to recover the audio. A similar design was available commercially in the UK back in the 1970s. Perf
Hobby Circuits and Small Projects Problems :: 01-22-2010 13:59 :: betwixt :: Replies: 1 :: Views: 5013
I need schematic for design of loop powered 4-20mA transmitter(output section )
I need solutions with opamp,REF,Reg,transistor(discrete )
Analog Circuit Design :: 06-17-2009 11:20 :: 7rots51 :: Replies: 1 :: Views: 2752
i'm looking for a schematic diagram for a syperheterodyne Rx with a proper values for the parts,coz i need to simulate it,can anyone help??
RF, Microwave, Antennas and Optics :: 04-10-2005 12:27 :: maramiro :: Replies: 1 :: Views: 670
I need UHF mixer schematic for downconverting ~450MHz to ~45MHz.
This is a receiver project.
Ther are a lot of docs. on the web about mixers. But I can't use any special IC . I have to use only a few transistor for "mixer" section.
RF, Microwave, Antennas and Optics :: 02-24-2004 04:11 :: cozturk :: Replies: 1 :: Views: 1420