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either or both IGBT's turn on and off 30,000 times per sec .... - - - Updated - - - normally for a series totem pole of igbt's one is on when the other is off and vice versa - else you will short the supply - hence each can switch at 30kHz, with a typ 48% ON time ...
Thank you Dominik I didn't mean to argue, but the circuit I draw for report I make it different. See I have partentioned the circuit to make it more visible, but nothing from transistor you can read nor it is clear to see the difference between nmos or pmos, may be there is option that make them saved bigger ? Thank you for the sofware you menti
Hello, I'm doing a research about some old Agilent/HP ATFs that have (probably) been counterfeited. I'm searching for these two old designer's catalogues, one by Agilent and one by HP: Communications Components Designer?s Catalog. Hewlett Packard. 5966-0895E (9/97) Semiconductor Products Designer?s Catalog. Agilent Technologies. CD. 5968-78
Hi, I made a research about WPE and I have seen that below some distance there is not any difference between PMOS and NMOS devices, i.e. in both cases the voltage threshold increases. But I am not sure if this conclusion is correct or if there are another properties that can be different due to its mobility carriers variation, (...)
Hello Everyone, I am really new at PCB design and forum. Maybe my questions would be silly if so, sorry in advance :) 159655 The PCB at the top is my design for BLDC motor control. The bottom one is a commercial product. Well, as you can see there are some differences I want to ask about them. [ATTACH=CO
Has somebody an idea, a suggestion in order to help me ? PIC 16F877A > Hereunder the code consisting of driving two servomotors separately for a 2 axes pan tilt. TMR2 : for 20 mS period TMR1 : for Ton UPPER servomotor TMR0 : for Ton LOWER servomotor I deleted the code consisting of driving LOWER servomotor because it?s works properly. For UPPER ser
I have just checked the include file P12F675.INC and TMR0IE is correct, you could just use the value 5 instead. The normal mistake that everyone makes is to use a o instead of an 0 in the name.
Hi, I'm trying to calculate a feedback compensator for SG3525 IC. I need pwm ramp voltage for this IC but it's not given in datasheet. How can I find or calculate it? Thank you.
Hi everyone, I am trying to design a dual-band Class E power amplifier at 2.4/3.5 GHz using only transmission lines for input matching and output matching networks. In the first step, I designed and simulated the circuit on ADS schematic using microstrip lines as in Figure 1 159622 I extracted the results, the perfor
The way the input source is applied to the Class AB amp, it seems that there should be no output that appear. Because when the input is positive half cycle, the diode D1 is reversed biased, there would not be an input to Q1 and Q2 is cutoff. Why is there an output? 159618
Hi everyone, I'm going to design a PCB with working voltages up to 1000V and I'm following IEC 60950 standard where the creepage/clearance distances are related to certain pollution level. The system will work in an industrial environment thus pollution level 3 will apply. In order to reduce the creepage distances and apply pollution level 1
Hi To All: im Trying to build a vending unit that uses serial data to get general information counters,status,serial an anotherInfo. I´m trying to implement a crc routine based in this Picbasic crc8 routine.CRC8: FOR CRC_IDX = 0 to 7 IF (CRC.7 ^ CRC_IN.7) THEN CRC = (CRC << 1) ^ CRC_Poly 'equals($31) ELSE CRC = CRC << 1 eNDIF CRC_I
I have cooler master silent pro defected after thunderstorm, there is 330v DC on main big condensators, also 5v stendby present but all other dead. There is no power VCC to IC cm6806+X, (I think this is used for PFC) 10pins smd. There is also 8pin dip (pin6 missing) a6069h Any help,schematics or else will be welcome Thanks
i want write size cell list in a manual, not used DMSA example) size_cell top / sub / core / nensa / TIE / part / place_opt4 BUFFD10TWPLVT i know cell ref_name list so i want cell size down -2 but, i have cell list more than 5000 (that's to many), it hard to used get_lib_cell * / cell_name * and one by one change down sizing This is be
i want write size cell list in a manual, not used DMSA example) size_cell top / sub / core / nensa / TIE / part / place_opt4 BUFFD10TWPLVT i know cell ref_name list so i want cell size down -2 but, i have cell list more than 5000 (that's to many), it hard to used get_lib_cell * / cell_name * and one by one change down sizing [COLOR=#000
I've got a large PCB with several DC-DC converters with a pulsed load, and some boards are making an acoustic clicking sound during large pulses. nothing spectacular, but localizing which component is the source is proving difficult because there are about a dozen inductors passing the pulsed current, all placed in a dense group. Component size ran
set_multicycle_path -from latch/D -to latch/D seems not work
I'm trying to create a univibe tyoe of guitar effect. That will consist of a timebase i.c. that will vary the sound to create a tremelo effect and various other phasing sounds. (Variable speed 1 to 30Hz) The trouble is I can't get it past the breadboard, although it works well enough I cannot avoid the sound of the I.C. switching, whether it be
Hi, I have multiple modules in the product includes PSU and Mother board circuitry which are operating at different frequency. Mother board is not yet designed yet and will be designed by other Designer. I am designing PSU for the Same and Product should comply EN61000-6-3 which has Levels for Class B (AV) 0.15MHZ-0.5MHZ
That microwave ovens do not operate at 2.45 GHz nor at resonance of the water molecule, being broadband emission and 2.45 GHz is a nominal figure to comply with license-free ISM bands. :shock: Does anyone knows a link/site that would tell more about the broadband range in microwave ovens magnetrons ?