Thanks for watching. For more Op Amp Circuits please see: Wilson Current Mirror and Current Source Design ruclips.net/video/LfbfJYrovN0/видео.html Temperature-Independent Current Circuit Design with Op Amp, BJT, Zener, Schottky Diodes ruclips.net/video/hFbnjbddUvs/видео.html On-Chip BJT Current Source Design ruclips.net/video/Rs7gEMk03dw/видео.html Thermometer Circuit Design with Op Amp & BJT transistor ruclips.net/video/55YsraFE0rg/видео.html Instrumentation Amplifier with Electronic Gain Control ruclips.net/video/C4tghZ-q6Zs/видео.html Push-Pull Power Amplifier with Darlington Transistors ruclips.net/video/866MYibo8yE/видео.html Analog Logarithm Computer ruclips.net/video/RpKEq5WyoLg/видео.html Op Amp Analog Computer Differential Equation Solver ruclips.net/video/ENq39EesfPw/видео.html Sawtooth Oscillator Design ruclips.net/video/2eUsGPfqbW4/видео.html Triangle Oscillator Op Amp circuit ruclips.net/video/JF5Up_cuL9k/видео.html Sallen-Key Analog Filter Design Tutorial ruclips.net/video/KwUnQXbk7gM/видео.html How to find Bode Plot, Freq Response, Transfer Function of Analog Filters ruclips.net/video/vZFkPeDa1H8/видео.html Universal Analog Filter Design ruclips.net/video/2J-0msXZE2o/видео.html Laplace Transform Example and S-domain circuit analysis: ruclips.net/video/ps8N5TPM_qU/видео.html Op Amp circuit Bode Frequency plot ruclips.net/video/BLVzuuqAlZs/видео.html Lowpass Butterworth Filter: ruclips.net/video/UzCjkwqy-9w/видео.html Analog Computer to Raise Signal to power n ruclips.net/video/IUTlBH1UraE/видео.html Differential Equation Solver Analog Circuit ruclips.net/video/R3X5AYNZGEI/видео.html Complex Sinusoid Oscillator ruclips.net/video/GXRhmwmS5Zk/видео.html Full-Wave Rectifier circuit example ruclips.net/video/DJJMNU-CYcg/видео.html Sawtooth Waveform Generator design with OpAmp, JFET, BJT ruclips.net/video/5zHXTx-Vl20/видео.html op amps Circuit with feedback loops to design an analog computer that solves a second order differential equation ruclips.net/video/HeZRtnRXpEI/видео.html For more analog circuits and signal processing examples see: ruclips.net/p/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt I hope these Circuit design and analysis videos are helpful. 🙂
Thanks for watching and your interest. Glad that you like this programmable bidirectional current source circuit. For more examples please see: Wilson Current Mirror and Current Source Design ruclips.net/video/LfbfJYrovN0/видео.html Thermometer Circuit Design with Op Amp & BJT transistor ruclips.net/video/55YsraFE0rg/видео.html Instrumentation Amplifier with Electronic Gain Control ruclips.net/video/C4tghZ-q6Zs/видео.html On-Chip Current Source with BJT ruclips.net/video/Rs7gEMk03dw/видео.html For additional analog circuits examples see: ruclips.net/p/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt I hope these Circuit Analysis videos are interesting.🙋♂️
You're welcome. Thanks for watching & encouraging comment. Glad that you like my circuit design & analysis videos. For more Analog Circuits please see: Thermometer Circuit Design with Op Amp & BJT transistor ruclips.net/video/55YsraFE0rg/видео.html Wilson Current Mirror and Current Source Design ruclips.net/video/LfbfJYrovN0/видео.html Instrumentation Amplifier with Electronic Gain Control ruclips.net/video/C4tghZ-q6Zs/видео.html On-Chip Current Source with BJT ruclips.net/video/Rs7gEMk03dw/видео.html I hope you like them as well. Thanks for watching 🙋♂️
You're welcome. Thank you for watching. Glad that you like this video. For more Analog Circuit examples pls see: Wilson Current Mirror and Current Source Design ruclips.net/video/LfbfJYrovN0/видео.html Thermometer Circuit Design with Op Amp & BJT transistor ruclips.net/video/55YsraFE0rg/видео.html Instrumentation Amplifier with Electronic Gain Control ruclips.net/video/C4tghZ-q6Zs/видео.html On-Chip Current Source with BJT ruclips.net/video/Rs7gEMk03dw/видео.html More examples are in the analog circuits and signal processing playlist ruclips.net/p/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt Thanks for watching. 🙏
Very nice and understandable video! Thank you! I'm looking for a programmable current source and sink for heating and cooling with a TEC (Peltier module). I want to not use PWM and a MOSFET (IRF520N) driver anymore, since the output voltage has some significant peaks disturbing the sensitive application, where I want to heat and cool. My TEC has a maximum rating of 1.9 A and I was wondering, if it would be possible, to use such a programmable current source circuit for that task. Do you have experience with that? Does that make sense and is it possible in a meaningful way to modify the circuit to allow for an output current of e.g. +/- 2 A? You're help would be much appreciated.
You're welcome. Glad that this video is useful. One potential way to increase current by 1000x to +/-2 Amp (without using external push-pull Darlington transistors) could be scaling up reference voltage V and simultaneously carefully scaling down R1, R2, Ra and Rb resistors. Proper selection of Op Amp will be important as well. Alternatively you can use push-pull Darlington BJT stage at the output to amplify current similar to the output stage in the video of Push-Pull Power Amplifier with Darlington and Sziklai Transistor pairs ruclips.net/video/866MYibo8yE/видео.html and also in Voltage Regulator Design with BJT Darlington Transistors and Zener Diodes ruclips.net/video/ArisQp7V0Ac/видео.html . I will try to post a video about this. I hope this is helpful.
@@STEMprof thank you for the fast reply and the helpful hints in which topics I might dive deeper to make the circuit work for my application. I am a beginner in designing circuits, but I am sure I can find a solution.
@@MaTzE_K95 You are welcome. Glad that my suggestion was helpful. In addition to this modified Howland circuit, there are more current source topologies discussed in other videos in my Analog Circuits Playlist. (Search for current source). Good luck with your design.
Hi, wouldn't it be better to replace Rb with a 1kOhm resistor AND add another 20 Ohm resistor in series to R2? To maintain the nice 0.001 relation between V and Io I guess we need to increase R1 to 51k in that case (50*1.02 = 51)...
Thanks for watching and sharing your thoughts & suggestions. Sure, there are many ways to realize the required Ra+Rb=R2. The reason I used 1kOhm potentiometer is because firstly its widely available with decent accuracy in both analog and digital format and secondly it can be adjusted to compensate for non-zero tolerance of R2 value (meaning it varies from design to design). Please also see additional example: Bilateral Current Source design ruclips.net/video/rjHdU1CVCcA/видео.html. I hope this clarification and additional example are helpful. Thanks again.🙏
Thanks for watching and your interest. Answering your question: as discussed in minute 20:18 to simply the resulting current equation, we need Ra+Rb=R2 as set in equation 5. Please watch near the end of the video and also this additional example: Bilateral Current Source design ruclips.net/video/rjHdU1CVCcA/видео.html. I hope this clarification and additional example are helpful. 🙋♂
Thanks for watching. For more Op Amp Circuits please see:
Wilson Current Mirror and Current Source Design ruclips.net/video/LfbfJYrovN0/видео.html
Temperature-Independent Current Circuit Design with Op Amp, BJT, Zener, Schottky Diodes ruclips.net/video/hFbnjbddUvs/видео.html
On-Chip BJT Current Source Design ruclips.net/video/Rs7gEMk03dw/видео.html
Thermometer Circuit Design with Op Amp & BJT transistor ruclips.net/video/55YsraFE0rg/видео.html
Instrumentation Amplifier with Electronic Gain Control ruclips.net/video/C4tghZ-q6Zs/видео.html
Push-Pull Power Amplifier with Darlington Transistors ruclips.net/video/866MYibo8yE/видео.html
Analog Logarithm Computer ruclips.net/video/RpKEq5WyoLg/видео.html
Op Amp Analog Computer Differential Equation Solver ruclips.net/video/ENq39EesfPw/видео.html
Sawtooth Oscillator Design ruclips.net/video/2eUsGPfqbW4/видео.html
Triangle Oscillator Op Amp circuit ruclips.net/video/JF5Up_cuL9k/видео.html
Sallen-Key Analog Filter Design Tutorial ruclips.net/video/KwUnQXbk7gM/видео.html
How to find Bode Plot, Freq Response, Transfer Function of Analog Filters ruclips.net/video/vZFkPeDa1H8/видео.html
Universal Analog Filter Design ruclips.net/video/2J-0msXZE2o/видео.html
Laplace Transform Example and S-domain circuit analysis: ruclips.net/video/ps8N5TPM_qU/видео.html
Op Amp circuit Bode Frequency plot ruclips.net/video/BLVzuuqAlZs/видео.html
Lowpass Butterworth Filter: ruclips.net/video/UzCjkwqy-9w/видео.html
Analog Computer to Raise Signal to power n ruclips.net/video/IUTlBH1UraE/видео.html
Differential Equation Solver Analog Circuit ruclips.net/video/R3X5AYNZGEI/видео.html
Complex Sinusoid Oscillator ruclips.net/video/GXRhmwmS5Zk/видео.html
Full-Wave Rectifier circuit example ruclips.net/video/DJJMNU-CYcg/видео.html
Sawtooth Waveform Generator design with OpAmp, JFET, BJT ruclips.net/video/5zHXTx-Vl20/видео.html
op amps Circuit with feedback loops to design an analog computer that solves a second order differential equation ruclips.net/video/HeZRtnRXpEI/видео.html
For more analog circuits and signal processing examples see: ruclips.net/p/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt
I hope these Circuit design and analysis videos are helpful. 🙂
Howland current pump is a great circuit! I used it in a saw tooth generator with controllable amplitude und it worked perfectly.
Thanks for watching and your interest. Glad that you like this programmable bidirectional current source circuit. For more examples please see: Wilson Current Mirror and Current Source Design ruclips.net/video/LfbfJYrovN0/видео.html
Thermometer Circuit Design with Op Amp & BJT transistor ruclips.net/video/55YsraFE0rg/видео.html
Instrumentation Amplifier with Electronic Gain Control ruclips.net/video/C4tghZ-q6Zs/видео.html
On-Chip Current Source with BJT ruclips.net/video/Rs7gEMk03dw/видео.html
For additional analog circuits examples see: ruclips.net/p/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt
I hope these Circuit Analysis videos are interesting.🙋♂️
These videos are very well done, with interesting circuits. Thank you for making them.
You're welcome. Thanks for watching & encouraging comment. Glad that you like my circuit design & analysis videos. For more Analog Circuits please see:
Thermometer Circuit Design with Op Amp & BJT transistor ruclips.net/video/55YsraFE0rg/видео.html
Wilson Current Mirror and Current Source Design ruclips.net/video/LfbfJYrovN0/видео.html
Instrumentation Amplifier with Electronic Gain Control ruclips.net/video/C4tghZ-q6Zs/видео.html
On-Chip Current Source with BJT ruclips.net/video/Rs7gEMk03dw/видео.html
I hope you like them as well. Thanks for watching 🙋♂️
Very nice exercise.
You're welcome. Thank you for watching. Glad that you like this video. For more Analog Circuit examples pls see: Wilson Current Mirror and Current Source Design ruclips.net/video/LfbfJYrovN0/видео.html
Thermometer Circuit Design with Op Amp & BJT transistor ruclips.net/video/55YsraFE0rg/видео.html
Instrumentation Amplifier with Electronic Gain Control ruclips.net/video/C4tghZ-q6Zs/видео.html
On-Chip Current Source with BJT ruclips.net/video/Rs7gEMk03dw/видео.html
More examples are in the analog circuits and signal processing playlist ruclips.net/p/PLrwXF7N522y4c7c-8KBjrwd7IyaZfWxyt
Thanks for watching. 🙏
Very nice and understandable video! Thank you!
I'm looking for a programmable current source and sink for heating and cooling with a TEC (Peltier module). I want to not use PWM and a MOSFET (IRF520N) driver anymore, since the output voltage has some significant peaks disturbing the sensitive application, where I want to heat and cool. My TEC has a maximum rating of 1.9 A and I was wondering, if it would be possible, to use such a programmable current source circuit for that task. Do you have experience with that? Does that make sense and is it possible in a meaningful way to modify the circuit to allow for an output current of e.g. +/- 2 A?
You're help would be much appreciated.
You're welcome. Glad that this video is useful. One potential way to increase current by 1000x to +/-2 Amp (without using external push-pull Darlington transistors) could be scaling up reference voltage V and simultaneously carefully scaling down R1, R2, Ra and Rb resistors. Proper selection of Op Amp will be important as well. Alternatively you can use push-pull Darlington BJT stage at the output to amplify current similar to the output stage in the video of Push-Pull Power Amplifier with Darlington and Sziklai Transistor pairs ruclips.net/video/866MYibo8yE/видео.html and also in Voltage Regulator Design with BJT Darlington Transistors and Zener Diodes ruclips.net/video/ArisQp7V0Ac/видео.html . I will try to post a video about this. I hope this is helpful.
@@STEMprof thank you for the fast reply and the helpful hints in which topics I might dive deeper to make the circuit work for my application. I am a beginner in designing circuits, but I am sure I can find a solution.
@@MaTzE_K95 You are welcome. Glad that my suggestion was helpful. In addition to this modified Howland circuit, there are more current source topologies discussed in other videos in my Analog Circuits Playlist. (Search for current source). Good luck with your design.
@@STEMprof Sounds good! I will have a look their.
Thanks!
Hi, wouldn't it be better to replace Rb with a 1kOhm resistor AND add another 20 Ohm resistor in series to R2? To maintain the nice 0.001 relation between V and Io I guess we need to increase R1 to 51k in that case (50*1.02 = 51)...
Thanks for watching and sharing your thoughts & suggestions. Sure, there are many ways to realize the required Ra+Rb=R2. The reason I used 1kOhm potentiometer is because firstly its widely available with decent accuracy in both analog and digital format and secondly it can be adjusted to compensate for non-zero tolerance of R2 value (meaning it varies from design to design). Please also see additional example: Bilateral Current Source design ruclips.net/video/rjHdU1CVCcA/видео.html. I hope this clarification and additional example are helpful. Thanks again.🙏
I’m confused. You said Ra+Rb=R2 but shouldn’t it be 1/(1/Ra+1/Rb)=R2?? Because they are in parallel
Thanks for watching and your interest. Answering your question: as discussed in minute 20:18 to simply the resulting current equation, we need Ra+Rb=R2 as set in equation 5. Please watch near the end of the video and also this additional example: Bilateral Current Source design ruclips.net/video/rjHdU1CVCcA/видео.html. I hope this clarification and additional example are helpful. 🙋♂
@@STEMprof thank you yes the video you linked helped me a lot :)
@@rudygomez6996 You're welcome. Glad that the current source circuit design video was helpful.
Sorry! I do not know a6