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Q&A What Sine-Wave Oscillator can be controlled with a microcontroller?

I need a Sine Wave Oscillator circuit that can allow me to control its frequency with a microcontroller. Until now all the topologies that I have found if the frequency is changed, a change in the ...

2 answers  ·  posted 2y ago by deleted user  ·  edited 1y ago by Lorenzo Donati‭

#5: Post edited by user avatar Lorenzo Donati‭ · 2023-08-10T17:01:11Z (over 1 year ago)
Retagged.
#4: Post edited by (deleted user) · 2023-01-16T11:28:37Z (almost 2 years ago)
  • I need a Sine Wave Oscillator circuit that can allow me to control its frequency with a microcontroller. Until now all the topologies that I have found if the frequency is changed, a change in the circuit component is mandatory here is some topologies:
  • :
  • [Courtesy of TEXAS INSTRUMENTS](https://www.ti.com/lit/an/sloa060/sloa060.pdf)
  • For now am going to be using Arduino as a microcontroller, some forums suggest the use of AD9850 module but I couldn't find it :( .
  • The frequency range that I am aiming is from 10 Hz to 1 MHz pure stable sinusoidal wave. And the amplitude of 10 Vpp ,1 mA , -28 dBc (if my calculation is correct), the two ways that i can think of to control the circuit is with the help of a digital potentiometer or a DAC of 8 bit or 12 bit.
  • **Edite:**
  • So i have found this circuit which is based on Varactor a VCO;
  • ![](https://electrical.codidact.com/uploads/wrt0p5s7y2a2d1ny40tn03pqoooy)![](https://electrical.codidact.com/uploads/wr9kq6t7166zltkpfnj5z2zuf4fi)
  • ![](https://electrical.codidact.com/uploads/9sw9le55zpy73ic4kvbauai503kc)
  • My question is why we need a DC isn't the AC enough?
  • I need a Sine Wave Oscillator circuit that can allow me to control its frequency with a microcontroller. Until now all the topologies that I have found if the frequency is changed, a change in the circuit component is mandatory here is some topologies:
  • :
  • [Courtesy of TEXAS INSTRUMENTS](https://www.ti.com/lit/an/sloa060/sloa060.pdf)
  • For now am going to be using Arduino as a microcontroller, some forums suggest the use of AD9850 module but I couldn't find it :( .
  • The frequency range that I am aiming is from 10 Hz to 10 MHz pure stable sinusoidal wave. And the amplitude of 10 Vpp ,1 mA , -28 dBc (if my calculation is correct), the two ways that i can think of to control the circuit is with the help of a digital potentiometer or a DAC of 8 bit or 12 bit.
  • **Edite:**
  • So i have found this circuit which is based on Varactor a VCO;
  • ![](https://electrical.codidact.com/uploads/wrt0p5s7y2a2d1ny40tn03pqoooy)![](https://electrical.codidact.com/uploads/wr9kq6t7166zltkpfnj5z2zuf4fi)
  • ![](https://electrical.codidact.com/uploads/9sw9le55zpy73ic4kvbauai503kc)
  • My question is why we need a DC isn't the AC enough?
#3: Post edited by (deleted user) · 2023-01-14T23:47:51Z (almost 2 years ago)
  • I need a Sine Wave Oscillator circuit that can allow me to control its frequency with a microcontroller. Until now all the topologies that I have found if the frequency is changed, a change in the circuit component is mandatory here is some topologies:
  • :
  • [Courtesy of TEXAS INSTRUMENTS](https://www.ti.com/lit/an/sloa060/sloa060.pdf)
  • For now am going to be using Arduino as a microcontroller, some forums suggest the use of AD9850 module but I couldn't find it :( .
  • The frequency range that I am aiming is from 10 Hz to 1 MHz pure stable sinusoidal wave. And the amplitude of 10 Vpp ,1 mA , -28 dBc (if my calculation is correct), the two ways that i can think of to control the circuit is with the help of a digital potentiometer or a DAC of 8 bit or 12 bit.
  • I need a Sine Wave Oscillator circuit that can allow me to control its frequency with a microcontroller. Until now all the topologies that I have found if the frequency is changed, a change in the circuit component is mandatory here is some topologies:
  • :
  • [Courtesy of TEXAS INSTRUMENTS](https://www.ti.com/lit/an/sloa060/sloa060.pdf)
  • For now am going to be using Arduino as a microcontroller, some forums suggest the use of AD9850 module but I couldn't find it :( .
  • The frequency range that I am aiming is from 10 Hz to 1 MHz pure stable sinusoidal wave. And the amplitude of 10 Vpp ,1 mA , -28 dBc (if my calculation is correct), the two ways that i can think of to control the circuit is with the help of a digital potentiometer or a DAC of 8 bit or 12 bit.
  • **Edite:**
  • So i have found this circuit which is based on Varactor a VCO;
  • ![](https://electrical.codidact.com/uploads/wrt0p5s7y2a2d1ny40tn03pqoooy)![](https://electrical.codidact.com/uploads/wr9kq6t7166zltkpfnj5z2zuf4fi)
  • ![](https://electrical.codidact.com/uploads/9sw9le55zpy73ic4kvbauai503kc)
  • My question is why we need a DC isn't the AC enough?
#2: Post edited by (deleted user) · 2023-01-10T17:32:45Z (almost 2 years ago)
  • I need a Sine Wave Oscillator circuit that can allow me to control its frequency with a microcontroller. Until now all the topologies that I have found if the frequency is changed, a change in the circuit component is mandatory here is some topologies:
  • :
  • [Courtesy of TEXAS INSTRUMENTS](https://www.ti.com/lit/an/sloa060/sloa060.pdf)
  • For now am going to be using Arduino as a microcontroller, some forums suggest the use of AD9850 module but I couldn't find it :( .
  • The frequency range that I am aiming is from 10 Hz to 1 MHz stable. The circuit must have less component **as possible**.
  • I need a Sine Wave Oscillator circuit that can allow me to control its frequency with a microcontroller. Until now all the topologies that I have found if the frequency is changed, a change in the circuit component is mandatory here is some topologies:
  • :
  • [Courtesy of TEXAS INSTRUMENTS](https://www.ti.com/lit/an/sloa060/sloa060.pdf)
  • For now am going to be using Arduino as a microcontroller, some forums suggest the use of AD9850 module but I couldn't find it :( .
  • The frequency range that I am aiming is from 10 Hz to 1 MHz pure stable sinusoidal wave. And the amplitude of 10 Vpp ,1 mA , -28 dBc (if my calculation is correct), the two ways that i can think of to control the circuit is with the help of a digital potentiometer or a DAC of 8 bit or 12 bit.
#1: Initial revision by (deleted user) · 2023-01-09T17:03:47Z (almost 2 years ago)
What Sine-Wave Oscillator can be controlled with a microcontroller?
I need a Sine Wave Oscillator circuit that can allow me to control its frequency with a microcontroller. Until now all the topologies that I have found if the frequency is changed, a change in the circuit component is mandatory  here is some topologies:
:  
[Courtesy of TEXAS INSTRUMENTS](https://www.ti.com/lit/an/sloa060/sloa060.pdf)  

For now am going to be using Arduino as a microcontroller, some forums suggest the use of AD9850 module but I couldn't find it :( .  
The frequency range that I am aiming is from 10 Hz to 1 MHz stable. The circuit must have less component **as possible**.