Hey guys,
Happy New 2020 to you all!
With this post I wanted to announce that I am starting Youtube channel on the design of audio power amplifiers. The content will be completely educational, and will cover the foundations of amplifier design and as well as the design of a best in class audio power amplifier. Searching Youtube, I noticed this has not been done before, so I wanted to give it a shot.
The plan is to keep updating this first post as an index of all the material as it gets published. The plan is to crank a video a week, so we'll see. I am pretty excited about this, so let's see how we fare.
GOALS FOR SW-VFA-01 AMPLIFIER (Specs):
- Power: 150 Watts
- THD: 0.001% worst case, 20KHz, max output power, 8ohm load
- Noise: 3.3nV/rtHz spectral noise, 3.2uV/rtHz
- SNR: 110dB SNR un-weighted at full power (redundant, but why not)
- Freq. response: 1.5Hz - 500KHz
- Input sensitivity: 1V_RMS
- Systematic DC Offset: <1mV
VIDEOS:
1.1. Audio Amplifier Design Fundamentals & SW-VFA-01: Introduction, Amplifier Specifications, Goals
SW-VFA-01 Video 1.1
1.2. Audio Amplifier Design Fundamentals: Measuring amplifier parameters with LTSpice
SW-VFA-01 Video 1.2
2.1. Audio Amplifier Design Fundamentals: Amplifier frequency response, Input Network & Power rails
SW-VFA-01 Video 2.1
2.2. Audio Amplifier Design Fundamentals: Input network design and test using LTSpice
SW-VFA-01 Video 2.2
3.1. Audio Amplifier Design Fundamentals: Fundamentals of negative feedback
SW-VFA-01 Video 3.1
3.2. Audio Amplifier Design Fundamentals: Measuring Loop gain and Open loop gain in LTSpice
SW-VFA-01 Video 3.2
4.1. Audio Amplifier Design Fundamentals: Two Stage voltage feedback amplifiers
SW-VFA-01 Video 4.1
4.2. Audio Amplifier Design Fundamentals: Two Stage voltage feedback amplifier model in LTSpice
SW-VFA-01 Video 4.2
4.3. Audio Amplifier Design Fundamentals: Measuring the loop gain of the major and minor loops of an amplifier in LTSpice
SW-VFA-01 Video 4.3
5.1. Audio Amplifier Design Fundamentals: Introduction to distortion in audio amplifiers
SW-VFA-01 Video 5.1
5.2.1 Audio Amplifier Design Fundamentals: Measuring harmonic distortion in LTSpice - Part 1
SW-VFA-01 Video 5.2 Part 1
5.2.2 Audio Amplifier Design Fundamentals: Measuring harmonic distortion in LTSpice - Part 2
SW-VFA-01 Video 5.2 Part 2
UPDATES:
1/07/2020: Just bought a microphone (Samson Meteor) - Thanks SGROSSKLASS! Starting video 2.1, audio quality will go up
.
1/25/2020: Will be launching parallel video series: LTSpice: How to.
2/25/2020: Forgot to put the model file for the HoneyBadger amplifier. It can be found on post #63.
3/1/2020: Uploaded my complete version of the HoneyBadger amplifier (schematic, symbol, test bench and models). It can be found on post #72.
Any feedback, comments, encouraging support and constructive criticism is welcome.
Thanks guys!
- Sandro (SW Audio)
Happy New 2020 to you all!
With this post I wanted to announce that I am starting Youtube channel on the design of audio power amplifiers. The content will be completely educational, and will cover the foundations of amplifier design and as well as the design of a best in class audio power amplifier. Searching Youtube, I noticed this has not been done before, so I wanted to give it a shot.
The plan is to keep updating this first post as an index of all the material as it gets published. The plan is to crank a video a week, so we'll see. I am pretty excited about this, so let's see how we fare.
GOALS FOR SW-VFA-01 AMPLIFIER (Specs):
- Power: 150 Watts
- THD: 0.001% worst case, 20KHz, max output power, 8ohm load
- Noise: 3.3nV/rtHz spectral noise, 3.2uV/rtHz
- SNR: 110dB SNR un-weighted at full power (redundant, but why not)
- Freq. response: 1.5Hz - 500KHz
- Input sensitivity: 1V_RMS
- Systematic DC Offset: <1mV
VIDEOS:
1.1. Audio Amplifier Design Fundamentals & SW-VFA-01: Introduction, Amplifier Specifications, Goals
SW-VFA-01 Video 1.1
1.2. Audio Amplifier Design Fundamentals: Measuring amplifier parameters with LTSpice
SW-VFA-01 Video 1.2
2.1. Audio Amplifier Design Fundamentals: Amplifier frequency response, Input Network & Power rails
SW-VFA-01 Video 2.1
2.2. Audio Amplifier Design Fundamentals: Input network design and test using LTSpice
SW-VFA-01 Video 2.2
3.1. Audio Amplifier Design Fundamentals: Fundamentals of negative feedback
SW-VFA-01 Video 3.1
3.2. Audio Amplifier Design Fundamentals: Measuring Loop gain and Open loop gain in LTSpice
SW-VFA-01 Video 3.2
4.1. Audio Amplifier Design Fundamentals: Two Stage voltage feedback amplifiers
SW-VFA-01 Video 4.1
4.2. Audio Amplifier Design Fundamentals: Two Stage voltage feedback amplifier model in LTSpice
SW-VFA-01 Video 4.2
4.3. Audio Amplifier Design Fundamentals: Measuring the loop gain of the major and minor loops of an amplifier in LTSpice
SW-VFA-01 Video 4.3
5.1. Audio Amplifier Design Fundamentals: Introduction to distortion in audio amplifiers
SW-VFA-01 Video 5.1
5.2.1 Audio Amplifier Design Fundamentals: Measuring harmonic distortion in LTSpice - Part 1
SW-VFA-01 Video 5.2 Part 1
5.2.2 Audio Amplifier Design Fundamentals: Measuring harmonic distortion in LTSpice - Part 2
SW-VFA-01 Video 5.2 Part 2
UPDATES:
1/07/2020: Just bought a microphone (Samson Meteor) - Thanks SGROSSKLASS! Starting video 2.1, audio quality will go up
1/25/2020: Will be launching parallel video series: LTSpice: How to.
2/25/2020: Forgot to put the model file for the HoneyBadger amplifier. It can be found on post #63.
3/1/2020: Uploaded my complete version of the HoneyBadger amplifier (schematic, symbol, test bench and models). It can be found on post #72.
Any feedback, comments, encouraging support and constructive criticism is welcome.
Thanks guys!
- Sandro (SW Audio)
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