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Thank you for replies.
The IC pin that I'm going to is 0.3mm in width. Can I still use a 2 layer board and narrow down the trace to connect to the pin?
If I use a trace that "fits" mechanically on a 2 layer board, it is 0.46 mm and the Z0 is 113 ohms.
What happens when the impedances are...
Hello-
I'm using a few different microstrip calculators, but when I draw my trace, the suggested width (2.9mm) seems huge.
Calculator here: https://ncalculators.com/electronics/microstrip-impedance-calculator.htm
The transmission line needs to be 50 ohms as it connects directly with a 50 ohm...
Hello-
I have an RC low-pass single order filter.
R = 40k
C = 10uF
The 3db point I'm filtering at is 1/2*pi*R*C = 0.4 Hz
The RC time constant is R*C = 0.4
Does this mean that there will be a 0.4 second delay between my input signal and output signal?
Thank you,
N_N
Thanks for that- I have seen a few circuits using a TF as input.
I do not understand how to design the antenna input part of the circuit.
For example, I am looking at a chip from Analog Devices ADL5511. There is a basic connection diagram on page 18 of the linked datasheet. Page 1 states that...
Has anyone used any of the LT5504 series chips?
If so, what have you used as the antenna input to this chip? They show a 1:1 transformer input in their example circuit, why?
What is a good antenna generally to use to detect a >1 GHz digital signal?
Thanks!
N_N
Thanks Rich.
Some more questions. Since US cell freqs are between 800 and 2700, I'd be detecting in that range. So OK, a really large band bandpass filter.
Too large of a band to be effective?
I looked up diode detector, what is this used for? - from Wikipedia: A diode detector is simply a...
Theoretically, is this the right way to approach a simple RF detection circuit?
Cut wire antenna to length of detection frequency, then use op-Amp gain circuit to amplify signal?
And why is the op-Amp in the previous circuit configured that way?
Thanks!
Nora
---------- Post added at 23:36...
I built a **broken link removed**that is called an extra sensitive RF detection circuit. I couldn't get it to work although other people say they did.
I also don't fully understand how it works, and therefore can't troubleshoot it. I see 4 op-Amps coupled with capacitors. The author of the...
Hello-
I am designing a 8x8 LED matrix with RGB LEDs. So 192 LEDs altogether.
I want to control them using PWM so that I can have all of the colors.
I am going to use a PIC with 5-8 PWM channels.
I am looking at some different LED drivers from Allegra and also from ST Microelectronics.
My...
So my first rule of troubleshooting electronics is to see if it is turned on and the power is making a good physical connection.
My second rule is to double check that I've designed that the power supply can handle the load.
I ignored the second rule and was running a 3-4A load off of a 300mA...
But they don't hold steady on unless the 3V supply is disconnected. Any ideas why?
Blinking is cute, but unacceptable.
Nora
Added after 44 minutes:
Had a thought. The light wires are run with inverters, 200VAC, about 1500Hz.
Could the inverters be making my LEDs blink from noise?
Nora
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