Clamper Circuits - Types of Clampers Circuits

Clamper Circuits

Types of Clampers Circuits 

In this post, I will tell you what is a Clamper Circuit. how can be made it? And How it's Work.

Clamper 

Clamper is a circuit. it is made with the help of a resistor, a diode, and a capacitor .which is shift the input signal into different Dc levels. that means the clamper circuit adds the positive or negative dc value in the input signal. who change the peek value of input signal but do not affect the RMS value of the input signal. 

They have two types -

• Positive Clamper
• Negative Clamper

Positive Clamper -

This type of Clamper Circuit is used to shift the input signal into a positive Dc level. 

They have three types - 

• Positive Clamper without Any Dc Source
• Positive Clamper With Positive Dc Source V2
• Positive Clamper With Negative Dc Source V2

Positive Clamper Without Any Dc Source 

This type of Clamper circuit uses to Shift the input signal into a positive Dc level. The upper peak value of the output signal is equal to two times of upper peak value of the input signal. And the lower peak value of the output signal is touch zero levels.

You can easily understand with the help of image -

Circuit With Waveform -

Output Characteristic -

• Ideal Characteristic

1. The upper peak value of output voltage = 2 x V
2. The lower peak value of output voltage = 0 level
3. RMS value of Output Voltage = Rms Value of input voltage 

• Practice Characteristic

1. The upper peak value of output voltage = 2 x V - VD 
2. The lower peak value of output voltage = 0 - VD
3. RMS value of Output Voltage  = Rms Value of input voltage 

Where VD = Voltage Drop Across the diode 
For Silicon diode VD = 0.5~0.8
For Germanium diode  VD = 0.2~0.4

Positive Clamper With Positive Dc Source V2 -

This type of Clamper circuit uses to Shift the input signal into a positive Dc level. 

You can easily understand with the help of image -

Output Characteristic -

• Ideal Characteristic

1. Upper peak value of output voltage = 2 x V + V2
2. Lower peak value of output voltage = 0 + V2
3. RMS value of Output Voltage  = Rms Value of input voltage 

• Practice Characteristic

1. Upper peak value of output voltage = 2 x V + V2 - VD 
2. Lower peak value of output voltage = 0 + V2 - VD
3. RMS value of Output Voltage  = Rms Value of input voltage 

Where VD = Voltage Drop Across the diode 
VD = Voltage of Dc Source V2
For Silicon diode VD = 0.5~0.8
For Germanium diode  VD = 0.2~0.4

Positive Clamper With Negative Dc Source V2 -

This type of Clamper circuit uses to Shift the input signal into a positive Dc level. 

You can easily understand with the help of image -

Output Characteristic -

• Ideal Characteristic

1. The upper peak value of output voltage = 2 x V - V2
2. The lower peak value of output voltage = 0 - V2
3. RMS value of Output Voltage = Rms Value of input voltage 

• Practice Characteristic

1. Upper peak value of output voltage = 2 x V - V2 - VD 
2. The lower peak value of output voltage = 0 - V2 - VD
3. RMS value of Output Voltage  = Rms Value of input voltage 

Where VD = Voltage Drop Across the diode 

VD = Voltage of Dc Source V2

For Silicon diode VD = 0.5~0.8

For Germanium diode  VD = 0.2~0.4

Negative Clamper -

This type of Clamper Circuit is used to shift the input signal into a Negative Dc level. 

They have three types - 

• Negative Clamper without Any Dc Source
• Negative Clamper With Positive Dc Source V1
• Negative Clamper With Negative Dc Source V1

Negative Clamper Without Any Dc Source - 

This type of Clamper circuit uses to Shift the input signal into a Negative Dc level. The lower peak value of the output signal is equal to two times of Lower peak value of the input signal. And Upper peak value of the output signal is touch zero levels.

You can easily understand with the help of image -

Circuit With Waveform -

Output Characteristic -

• Ideal Characteristic

1. The upper peak value of output voltage = 0 level
2. Lower peak value of output voltage = - 2 x V1
3. RMS value of Output Voltage  = Rms Value of input voltage 

• Practice Characteristic

1. Upper peak value of output voltage = 0 + VD 
2. Lower peak value of output voltage = - 2 x V1 + VD
3. RMS value of Output Voltage = Rms Value of input voltage 

Where VD = Voltage Drop Across the diode 
For Silicon diode VD = 0.5~0.8
For Germanium diode  VD = 0.2~0.4

Negative Clamper With Positive Dc Source V2 -

This type of Clamper circuit uses to Shift the input signal into a Negative Dc level. 

You can easily understand with the help of image -

Output Characteristic -

• Ideal Characteristic

1. Upper peak value of output voltage = 0 + V2
2. Lower peak value of output voltage = - 2 x V + V2
3. RMS value of Output Voltage = Rms Value of input voltage 

• Practice Characteristic

1. Upper peak value of output voltage = 0 + V2 + VD 
2. Lower peak value of output voltage = - 2 X V1 + V2 + VD
3. RMS value of Output Voltage = Rms Value of input voltage 

Where VD = Voltage Drop Across the diode 
VD = Voltage of Dc Source V2
For Silicon diode VD = 0.5~0.8
For Germanium diode  VD = 0.2~0.4

Negative Clamper With Negative Dc Source V2 -

This type of Clamper circuit uses to Shift the input signal into a Negative Dc level. 

You can easily understand with the help of image -

Output Characteristic -

• Ideal Characteristic

1. The upper peak value of output voltage = 0 - V2
2. Lower peak value of output voltage = - 2 x V1 - V2
3. RMS value of Output Voltage  = Rms Value of input voltage 

• Practice Characteristic

1. Upper peak value of output voltage = 0 - V2 + VD
2. Lower peak value of output voltage = - 2 x V1 - V2 + VD
3. RMS value of Output Voltage = Rms Value of input voltage 

Where VD = Voltage Drop Across the diode 

VD = Voltage of Dc Source V2

For Silicon diode VD = 0.5~0.8

For Germanium diode  VD = 0.2~0.4