User 比尔盖子

44 votes

5 answers

13k views

Why did Axial Capacitors Fall Out of Use in the Industry?

asked Jan 7, 2020 at 19:20

33 votes

3 answers

10k views

Why would a Intel 8080 chip be destroyed if +12 V is connected before −5 V?

asked Sep 2, 2019 at 0:54

22 votes

6 answers

3k views

Does Impedance Matching Imply any Practical RF Transmitter Must Waste >=50% of Energy?

asked Jul 23, 2019 at 8:07

17 votes

3 answers

2k views

Why am I Seeing A Weird "Notch" on the Data Line For Some Logical 1s?

asked Jun 6, 2019 at 21:46

12 votes

3 answers

2k views

The Pin 1 Problem in Audio, Star and Mesh Ground, and Contradictory Grouding Practices in Audio and Digital Systems

asked Sep 30, 2019 at 10:29

7 votes

2 answers

888 views

Did the USB 2.0 BC "charging downstream port" never catch on? Has a major computer manufacturer ever implemented it?

asked Mar 17, 2020 at 17:05

5 votes

4 answers

2k views

Adding Two Balun Transformers to SA612 Mixer Has No Effect on LO Suppression

asked Nov 16, 2019 at 19:25

5 votes

2 answers

764 views

Qucs simulation of quarter wave microstrip stub doesn't match ideal calculaton

asked Dec 12, 2020 at 20:46

5 votes

1 answer

140 views

Floating high-side thyristor switch is destroyed by massive gate voltage undershoots

asked Nov 12, 2022 at 22:03

4 votes

2 answers

923 views

How does a common-emitter rail-to-rail opamp output stage work? Is there a discrete example?

asked Dec 24, 2019 at 17:41

4 votes

1 answer

1k views

When to Remove the Ground Plane under SMD components for High-Speed Signals?

asked Apr 17, 2020 at 6:13

4 votes

1 answer

192 views

What mechanism is responsible for the β/hFE variations in manufactured bipolar transistors?

asked Feb 28, 2020 at 4:22

3 votes

1 answer

532 views

What does the 25 Ω termination resistor do in a 0/180-degree hybrid power splitter?

asked Feb 28, 2020 at 13:31

3 votes

2 answers

1k views

Does a Center-Tapped RF Balun Perform Better than Untapped Baluns?

asked Oct 1, 2019 at 4:54

3 votes

3 answers

5k views

Does cooling the NAND chips on an SSD negatively affect its reliability?

asked Jun 10, 2020 at 12:04

2 votes

1 answer

107 views

Why does a MOSFET or IGBT's surge current rating stop increasing with decreasing pulse width beyond a point, unlike thyristors?

asked Dec 17, 2022 at 9:09

2 votes

1 answer

150 views

Insulation safety ratings (working and withstand voltage) of fiber optics cables

asked Jul 27, 2022 at 18:43

2 votes

1 answer

568 views

How do I find the return loss of a transformer from its 4-port S-parameter data?

asked Oct 18, 2019 at 5:02

2 votes

2 answers

922 views

Low Signal from Single Transistor Pierce Oscillator Mysteriously Turns High

asked Apr 5, 2019 at 22:18

2 votes

5 answers

236 views

Why is Frequency Conversion Additive in Acoustics Beating, but Multiplicative in Heterodyning?

asked Dec 8, 2019 at 1:15

1 vote

1 answer

735 views

Set the Gain of an Opamp Accurately Using a Potentiometer

asked Dec 16, 2019 at 16:55

1 vote

1 answer

92 views

Do I need to Reduce the Width of a Power Trace for Thermal Relief When it's Passing Through a Pin on the Chip?

asked May 14, 2020 at 14:20

1 vote

1 answer

211 views

What is the intended use of the 400 Hz-rated power supply on osciloscopes?

asked Jun 29, 2019 at 22:58

1 vote

1 answer

142 views

Power Cable Strain Relief Solution Needed for Restoring Vintage Electronics

asked Sep 22, 2019 at 4:27

1 vote

1 answer

122 views

How do I Avoid Very Long Horizontal Signal Path "Snakes" in a Schematic?

asked Sep 23, 2019 at 9:03

0 votes

1 answer

472 views

Common-Emitter NPN Transistor Amplifier Simulation Failed

asked Apr 1, 2019 at 14:58

0 votes

0 answers

25 views

How do I slice a vector in a Qucs simulation using an equation?

asked Nov 6, 2022 at 7:14

0 votes

0 answers

68 views

Reducing Thermal Pad Size Below Official Footprint - Can It Create Manufacturability Problems?

asked Oct 1, 2020 at 16:10

0 votes

1 answer

298 views

Doubts about SFP+ Transceivers' Host Power Supply Noise Requirements for 10 Gigabit Ethernet

asked Aug 21, 2021 at 23:24

Stack Exchange Network

29 Questions

Why did Axial Capacitors Fall Out of Use in the Industry?

Why would a Intel 8080 chip be destroyed if +12 V is connected before −5 V?

Does Impedance Matching Imply any Practical RF Transmitter Must Waste >=50% of Energy?

Why am I Seeing A Weird "Notch" on the Data Line For Some Logical 1s?

The Pin 1 Problem in Audio, Star and Mesh Ground, and Contradictory Grouding Practices in Audio and Digital Systems

Did the USB 2.0 BC "charging downstream port" never catch on? Has a major computer manufacturer ever implemented it?

Adding Two Balun Transformers to SA612 Mixer Has No Effect on LO Suppression

Qucs simulation of quarter wave microstrip stub doesn't match ideal calculaton

Floating high-side thyristor switch is destroyed by massive gate voltage undershoots

How does a common-emitter rail-to-rail opamp output stage work? Is there a discrete example?

When to Remove the Ground Plane under SMD components for High-Speed Signals?

What mechanism is responsible for the β/hFE variations in manufactured bipolar transistors?

What does the 25 Ω termination resistor do in a 0/180-degree hybrid power splitter?

Does a Center-Tapped RF Balun Perform Better than Untapped Baluns?

Does cooling the NAND chips on an SSD negatively affect its reliability?

Why does a MOSFET or IGBT's surge current rating stop increasing with decreasing pulse width beyond a point, unlike thyristors?

Insulation safety ratings (working and withstand voltage) of fiber optics cables

How do I find the return loss of a transformer from its 4-port S-parameter data?

Low Signal from Single Transistor Pierce Oscillator Mysteriously Turns High

Why is Frequency Conversion Additive in Acoustics Beating, but Multiplicative in Heterodyning?

Set the Gain of an Opamp Accurately Using a Potentiometer

Do I need to Reduce the Width of a Power Trace for Thermal Relief When it's Passing Through a Pin on the Chip?

What is the intended use of the 400 Hz-rated power supply on osciloscopes?

Power Cable Strain Relief Solution Needed for Restoring Vintage Electronics

How do I Avoid Very Long Horizontal Signal Path "Snakes" in a Schematic?

Common-Emitter NPN Transistor Amplifier Simulation Failed

How do I slice a vector in a Qucs simulation using an equation?

Reducing Thermal Pad Size Below Official Footprint - Can It Create Manufacturability Problems?

Doubts about SFP+ Transceivers' Host Power Supply Noise Requirements for 10 Gigabit Ethernet