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Hello,
I have two amplifiers:
https://www.skyworksinc.com/uploads/documents/SKY67100_396LF_201265I.pdf
https://www.asb.co.kr/datasheet/ASW114.pdf
1. Why thermal resistance differ so much? SKY67100_396LF - 80 0C/W; ASW114 - 321 0C/W.
2. According to calculations for 25 0C ambient temperature, Tj...
Normally open I do not need. Thx, I will look for it.
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As I saw, there are only ON-OFF switches. But this what I want I don't see (without power supply normally closed in one position, after power supply goes to the second position).
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Looks like I need 1...
Hello,
Does High Frequency Normally Closed Switch exists? It should work up to 3GHz and should have small SMD package.
Explanation what I need:
It should be normally closed switch, which without power supply is closed to one position. So two of them should works as a bypass (with low losses)...
Hello,
I design 868MHz IFA antenna. It should be placed in one corner of 160x160mm PCB. Small part of GND under the antenna structure is destinated for antenna GND. On the rest part of PCB will be elements and also GND. So can I set whole surface of PCB as a metal (copper)? Are the simulations...
This is the question, can I use f.e. DAC output of uC and digital potentiometer in base circuit of transistor to regulate base current and through this collector current?
As default this will be charger/discharger controlled by microcontroller. I must measure current and voltage. So how to implement discharger in this circuit? Should I use some relay and second transistor with resistor?
Hello,
I design supercapacitor charger/discharger. Output voltage 0-15V. Output current 0-10A. Capacitors capacitance: few hunderts F. I plan use LT3761 IC.
How to charge, set current, and voltage I know. Question is how to extend this circuit for discharging?
Regards
Hello,
I work with CST Studio Suite 2012 and have big problem.
When I want to only save empty new project or simulate some structure then I have everytime error:
Program installed on Fujitsu Siemens Esprimo Mobile laptop: XP SP3, Pentium Dual T3200, 1,75GB RAM, SiS Mirage 3 GPU. Same situation...
I solved this problem myself, I add some gain (virtual gain? I'm not sure It was physically added or only added to calculation, f.e. 10 or 20 dBm) to RF2 port (for TX only), and when I was writing measurements results from CMU200 I subtract this gain (10 or 20 dBm), but everytime connection was...
Hello,
I work with CMU200 BTS simulator. I have a problem: I can't connect with phone when attenuation of coupler antenna is more than 25dBm. For example: I work with GSM900, TX power set to 20 dBm, RX power to -50dBm, phone lies on the coupler antenna, connecion is established, CMU gives me...
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