Hi, does this make much sense? http://smartheatsinks.com/SHS_SMT.pdf The heat path between the transistor and the heatsink is...

Hi, does this make much sense? http://smartheatsinks.com/SHS_SMT.pdf The heat path between the transistor and the heatsink is awkward. Best regards, Piotr

All you electronics|semiconductor gurus here. Any commercially available junctionless transistors ? Kist curious .

All you electronics|semiconductor gurus here. Any commercially available junctionless transistors ? Kist curious .

Hi For fun I need to inspect the die in a typical BC847 SOT23 plastic housing How do one decap that transistor? Cheers Klaus

Hi For fun I need to inspect the die in a typical BC847 SOT23 plastic housing How do one decap that transistor? Cheers Klaus

Imagine an NPN transistor. Ground the emitter and connect the collector to some nice positive voltage. Now pull the base negative, through a...

Imagine an NPN transistor. Ground the emitter and connect the collector to some nice positive voltage. Now pull the base negative, through a current-limiting resistor. What happens?

Has anyone seen a NPN bipolar transistor with emitter in the middle, tab. Emitter is easier to ground in RF amplifiers.

Has anyone seen a NPN bipolar transistor with emitter in the middle, tab. Emitter is easier to ground in RF amplifiers.

Could some electronics guri here help please ? Where could I find datasheets, specifications and SPICE models if any, of commercially available...

Could some electronics guri here help please ? Where could I find datasheets, specifications and SPICE models if any, of commercially available hetero bijunction transistors. Thanks in advance.

Hi all, It still amazes me after all the years LTspice has been around the standard parts library in it remains so tiny. I don't think this...

Hi all, It still amazes me after all the years LTspice has been around the standard parts library in it remains so tiny. I don't think this long- standing defect in otherwise very good program will ever be fixed. So like anyway, has anyone got a model for a BD131 NPN transistor they could post here? TIA folks. CD

I remember reading some while ago that LLL was working with fast switching = transistors which generated "radar wavelength" signals. Then, as...

I remember reading some while ago that LLL was working with fast switching = transistors which generated "radar wavelength" signals. Then, as events go,= a Georgia Tech Prof. raised a stink since he had previously developed thos= e applications. Again, a vague memory. Does anyone recall this? TIA JB

Cool part. 20V enhancement N-ch MOSFET. Vgs.th(100uA)

Cool part. 20V enhancement N-ch MOSFET. Vgs.th(100uA)

I'm trying to add the models of a couple of N-FETs I use to LTSpice. I'm getting a simulation-time error that I can't resolve. Any ideas? ...

I'm trying to add the models of a couple of N-FETs I use to LTSpice. I'm getting a simulation-time error that I can't resolve. Any ideas? Thanks. The error: |M1: Only a level 9 B3SOI can have 6 nodes It thinks I have six terminals on my transistor and only SOI models have that many? Looks like only three to me. The circuit: Version 4 SHEET 1 880 680 WIRE 144 -80 16 -80 ...

I decided to delve deeper into the mystery. Here is an .asc file of the strange circuit previously under...

I decided to delve deeper into the mystery. Here is an .asc file of the strange circuit previously under discussion. https://app.box.com/s/cwlnjt5zh14ubdaul4odvhcehw2tnapa Unless I have made an error, it appears to be non-functional. I am now preparing a bonfire for my collection of such old documents. Robert Miller

Hello, I know that there are hordes of nice comparators in SOT-23, but just out of curiosity: is it possible to build a small voltage...

Hello, I know that there are hordes of nice comparators in SOT-23, but just out of curiosity: is it possible to build a small voltage (relatively to GND) detector using just one transistor and no negative power supplies? If the voltage is > = VBE, i.e. 0.7V, then the task is a no-brainer, but how about half of that, say, 0.3V? Best reagrds, Piotr

Yes. https://www.eevblog.com/forum/projects/transistors-die-pictures/msg3234138/#msg3234138 Tim -- Seven Transistor Labs, LLC Electrical...

Yes. https://www.eevblog.com/forum/projects/transistors-die-pictures/msg3234138/#msg3234138 Tim -- Seven Transistor Labs, LLC Electrical Engineering Consultation and Design Website: https://www.seventransistorlabs.com/

https://www.eevblog.com/forum/metrology/film-and-ceramic-capacitor-leakage-current/ Tim -- Seven Transistor Labs, LLC Electrical...

https://www.eevblog.com/forum/metrology/film-and-ceramic-capacitor-leakage-current/ Tim -- Seven Transistor Labs, LLC Electrical Engineering Consultation and Design Website: https://www.seventransistorlabs.com/

I'm using a TIP31C (pnp in to-220 pac) as a temp sensor (diode connected) There's a couple of depletion fets in series as current limiters....

I'm using a TIP31C (pnp in to-220 pac) as a temp sensor (diode connected) There's a couple of depletion fets in series as current limiters. (LND150) The b-e junction starts to zener at ~30 V (only two tested so far). So I've got ~1.5 mA flowing at 30 V. Is this going to damage the junction? Will it take time? I'm going to measure forward voltage again after zenering for 15 minutes. Sho...

I need a super-low noise power supply. I have a 15 volt switching wall-wart input and want as close to 15 volts, regulated, as I can get;...

I need a super-low noise power supply. I have a 15 volt switching wall-wart input and want as close to 15 volts, regulated, as I can get; 14 would be nice, 13.5 is OK. The LDOs that I can find are all pretty noisy and have mediocre PSRR. So I thought about using a Phil Hobbs-ian c-multiplier transistor, an R-C lowpass and an emitter follower, with a slow opamp loop wrapped around i...

Speaking of SPICE, here's a nice little circuit: https://www.seventransistorlabs.com/Images/BakerDarlington.png I discovered the oscillator on...

Speaking of SPICE, here's a nice little circuit: https://www.seventransistorlabs.com/Images/BakerDarlington.png I discovered the oscillator on the left, when attempting to build a Darlington transistor pair with a Baker clamp. (In practice, R10 comes from a logic voltage input, and R2 is a load, often inductive. R14 is optional, but exacerbates the oscillation, making it reproducible.)...

I'm looking for one or two of these arrays for a small home project. Yes, I know they're available from China on eBay, but I'd much rather find...

I'm looking for one or two of these arrays for a small home project. Yes, I know they're available from China on eBay, but I'd much rather find a couple of vintage (and authentic and working) parts from someone's bin. There may be other parts that are suitable, but this is the only array I remember where all the devices are fully pinned-out. This requirement is important and excludes LM30...

I need to make a mixer (a multiplier, not an adder) for sinusoid signals somewhere between about 10 kHz and 1 Mhz. This is for a lock-in-amp. My...

I need to make a mixer (a multiplier, not an adder) for sinusoid signals somewhere between about 10 kHz and 1 Mhz. This is for a lock-in-amp. My main constraint is low cost. I'd use a microcontroller with an A to D and a hardware multiplier, but I'd like to keep the cost down by using a cheaper micro. I could use a simple power-of-2 window in the micro and then only need additions to dem...

Hi, knowing that you often take parts way beyond their specs, I would like to use your wisdom. I need a high-side controllable switch...

Hi, knowing that you often take parts way beyond their specs, I would like to use your wisdom. I need a high-side controllable switch capable of charging 5pF to 400V and maintaining most of that charge for a good fraction of a second. Not important if it is a PMOS or a PNP transistor. Could you please recommend me a part known for a particularly low leakage current? Or should I use...