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0
votes
4answers
142 views

Impedance matching for amplifier output

I needed some basic advice about impedance matching. I have an RF amplifier with 50 ohm output impedance, capable of generating 400W output power at 500kHz. I am trying to deliver this to a 12 ohm ...
4
votes
3answers
156 views

Impedance matching an RLC circuit (inductor macroscopically drawn on PCB)

Context: I am a physics grad student with basic knowledge of circuits, but impedance matching and RF domain are beyond my normal scope. My PCB is actually copper bonded to a ceramic substrate that is ...
3
votes
2answers
99 views

CC1120 and RF output pin and network

I am working on a hobby design and thinking of using the CC1120 for my RF transceiver. One thing that has me confused, however, is the matching circuitry on the RF input and output of the CC1120. ...
6
votes
1answer
175 views

A poor man's alternative to a network analizer for antenna matching

I'm doing a small board with a 915 MHz transceiver. A small helical antenna is used, which is located on board with a very short path (10 mm) from the IC, including balun and a matching network. There ...
2
votes
1answer
86 views

Computational complexity of current netlist matching algorithms

I understand that the problem of matching two netlists could be reduced to the graph isomorphism problem which is NP-intermediate. Apart from that what are the complexity results of some of the ...
0
votes
1answer
69 views

Impedance Matching Resistor

I'm working on a high speed ADC/DAC board. I saw some reference designs for the device, there are matching series resistors connected between output digital pins & controller. Though, resistor ...
2
votes
3answers
845 views

Custom USB Impedance question

I'm looking at making my own USB cable for a project. The primary issue I'm having is that I'm getting a lot of capacitance in my cable between D+ and D- (400ish pF) which is enough to throw off the ...
0
votes
0answers
331 views

Problem with impedance matching on DIY 4 pole 3.5mm audio splitter

I built an audio 4 connector 3.5mm splitter. The goal is to play a sound clip through a phone's mic input across a call, while recording the same sound clip on the computer. I used the TRRS ...
2
votes
0answers
153 views

Matching mosfets - linear servo amplifier (AB)

I'm replacing a bunch of burnt mosfets in a linear amplifier for a brushless motor. 3 phases Each phase: 3 pairs of totem IRFP240 / IRFP9240 in parallell. (no R in series) My main concern is ...
2
votes
1answer
199 views

Intersection Turning Movement counts

Civil Traffic Engineers have a perpetual data gathering problem. They need intersection turning movement counts to do their studies. This has historically been a manual task. Someone sits by the ...
1
vote
1answer
255 views

Can I plug 4 Ohm speakers to 16 Output directly?

I have Samsung YP-U3 player with Earphone Output 20mW (16Ω) and I want to connect it with speakers taken out from my old laptop that are two 4Ω (1.5W). Can I do it directly or speaker will break down ...
3
votes
2answers
326 views

How do you find matched components?

I am designing a twin-T filter, which has a cut-off around 4.5 MHz. In this filter, both R1 and R2 must be 2 x R3. C1 and C2 must be half of C3. I have selected R1 = 10k and C1 = 3.6pF and that gives ...
6
votes
3answers
767 views

Can I merge two impedance matching circuits?

I've got an RF transceiver (Nordic's nRF24L01+) which shows a typical circuit to match its antenna output to a single ended 50 ohm impedance. I've also got a chip antenna which comes with an example ...