User tobalt

17 votes

2 answers

2k views

LTspice fails at a simple two-resistor voltage divider. How can I fix it?

ltspice voltage-divider

asked Nov 22, 2021 at 11:35

9 votes

3 answers

1k views

Is charging a capacitor to a new DC voltage fundamentally lossy?

asked Apr 4 at 10:54

8 votes

9 answers

1k views

Do I misunderstand fuses?

protection fuses polyfuse

asked Jan 8 at 8:40

7 votes

2 answers

2k views

Is it a bad practice to use capacitors to GND to prevent long traces from ringing?

pcb-design emi-filtering

asked Dec 13, 2021 at 9:14

6 votes

1 answer

267 views

What are the drawbacks of connecting circuit GND and Chassis via multiple mounting screws (for EMC and Safety)?

ground safety emc esd chassis

asked Feb 21 at 9:28

6 votes

1 answer

194 views

Diode forward current with µV..mV forward bias

diodes leakage-current

asked Apr 5, 2021 at 20:34

5 votes

2 answers

387 views

Why does this PMOS LDO require no compensation to be stable?

operational-amplifier ltspice simulation ldo stability

asked Jul 8, 2021 at 12:53

5 votes

2 answers

370 views

Is this TL431-based overvoltage limiter circuit alright?

over-voltage-protection tl431

asked Dec 6, 2021 at 9:07

5 votes

4 answers

236 views

When to use discrete JFETs? [closed]

transistors jfet

asked May 29 at 11:15

5 votes

6 answers

1k views

Are anodized fan filters efficient at blocking EMI?

emc fan emi-filtering

asked Nov 2, 2021 at 9:26

4 votes

2 answers

123 views

Why is it suggested to power XOs with LDOs?

power-supply oscillator crystal ldo ripple

asked Nov 8, 2021 at 16:13

4 votes

1 answer

172 views

Why does the comparator burn in this oscillator circuit?

power-supply comparator failure

asked Dec 14, 2021 at 14:41

4 votes

1 answer

147 views

Opamp voltage follower with weak positive feedback

operational-amplifier noise feedback positive-feedback

asked Feb 11 at 17:03

4 votes

3 answers

534 views

Unused Opamp Termination: How does it cause increased current consumption?

operational-amplifier cmos single-supply-op-amp rail-to-rail

asked Jul 23, 2021 at 7:20

4 votes

0 answers

45 views

How to show opamp noise contribution in LTspice .noise calculation

operational-amplifier noise ltspice

asked May 19, 2021 at 11:28

3 votes

1 answer

138 views

How to fix oscillations in cable guard drive?

operational-amplifier oscillation guard

asked May 8, 2021 at 9:09

3 votes

0 answers

121 views

What determines noise spectral density of diode-resistors?

resistors diodes noise noise-spectral-density

asked Oct 8, 2021 at 11:33

3 votes

2 answers

304 views

BJT Base-Emitter Reverse Breakdown

bjt reverse-breakdown avalanche-breakdown

asked Aug 30, 2021 at 13:45

3 votes

3 answers

666 views

Purpose of high resistance ferrite beads?

ferrite-bead

asked Jul 21, 2021 at 10:27

3 votes

1 answer

123 views

How lossy is a ferrite bead in its "capacitive" regime?

ltspice magnetics modeling ferrite-bead

asked Dec 18, 2021 at 14:03

3 votes

1 answer

255 views

Wrong data clocked in when using direct daisy chains of 594/595 shift-registers

shift-register timing

asked Oct 25, 2021 at 13:41

2 votes

1 answer

315 views

Is the 'UniversalOpamp2' in LTspice useful for stability in capacitive drive applications?

operational-amplifier ltspice stability

asked Oct 14, 2021 at 13:40

2 votes

1 answer

81 views

Where to place a cooling fan supply capacitor

emc fan electrolytic-capacitor

asked Oct 21, 2021 at 7:09

2 votes

1 answer

74 views

How much current can opamps' integrated ESD diodes carry during an ESD strike?

operational-amplifier diodes esd diode-clamp

asked Feb 1 at 16:23

2 votes

0 answers

48 views

Op Amp Input noise and bias current relation with input quiscient current

operational-amplifier noise input-bias-current

asked Jun 16, 2021 at 15:00

2 votes

1 answer

117 views

Decoupling caps not near IC pins - global decoupling

decoupling-capacitor

asked Mar 31, 2021 at 12:57

2 votes

2 answers

268 views

Replacement for low resistance JFET current limiter?

operational-amplifier current-limiting jfet replacement

asked May 19, 2021 at 13:11

1 vote

2 answers

80 views

Are there optoisolators available that output a photovoltage of at least 2-3 V?

led opto-isolator voltage-source

asked May 26, 2021 at 13:13

1 vote

3 answers

233 views

ON/OFF rocker switches - convention about which side should be top/bottom?

switches toggle-switch alignment

asked Jun 2, 2021 at 10:23

1 vote

2 answers

44 views

Opamp input fault current limit vs fault duration

operational-amplifier esd fault

asked May 13, 2021 at 21:40

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68 Questions

LTspice fails at a simple two-resistor voltage divider. How can I fix it?

Is charging a capacitor to a new DC voltage fundamentally lossy?

Do I misunderstand fuses?

Is it a bad practice to use capacitors to GND to prevent long traces from ringing?

What are the drawbacks of connecting circuit GND and Chassis via multiple mounting screws (for EMC and Safety)?

Diode forward current with µV..mV forward bias

Why does this PMOS LDO require no compensation to be stable?

Is this TL431-based overvoltage limiter circuit alright?

When to use discrete JFETs? [closed]

Are anodized fan filters efficient at blocking EMI?

Why is it suggested to power XOs with LDOs?

Why does the comparator burn in this oscillator circuit?

Opamp voltage follower with weak positive feedback

Unused Opamp Termination: How does it cause increased current consumption?

How to show opamp noise contribution in LTspice .noise calculation

How to fix oscillations in cable guard drive?

What determines noise spectral density of diode-resistors?

BJT Base-Emitter Reverse Breakdown

Purpose of high resistance ferrite beads?

How lossy is a ferrite bead in its "capacitive" regime?

Wrong data clocked in when using direct daisy chains of 594/595 shift-registers

Is the 'UniversalOpamp2' in LTspice useful for stability in capacitive drive applications?

Where to place a cooling fan supply capacitor

How much current can opamps' integrated ESD diodes carry during an ESD strike?

Op Amp Input noise and bias current relation with input quiscient current

Decoupling caps not near IC pins - global decoupling

Replacement for low resistance JFET current limiter?

Are there optoisolators available that output a photovoltage of at least 2-3 V?

ON/OFF rocker switches - convention about which side should be top/bottom?

Opamp input fault current limit vs fault duration