# Base Feedback Bias

Inputs:

V
V
V
mA

Theoritical Results:

### About Self Biased BJT Amplifier Design Calculator

Base or Fixed Biased BJT Amplifier Design Calculator is a powerful tool used in the design of transistor amplifiers. The BJT amplifier is a common type of amplifier that is widely used in electronic circuits. The term “Base or Fixed Biased” refers to the method used to set the bias voltage to the transistor. The base bias is set to a fixed value, which determines the operating point of the transistor. The operating point of the transistor is an important parameter in determining the gain and stability of the amplifier.
The Base or Fixed Biased BJT Amplifier Design Calculator allows the user to enter values for the transistor parameters such as the beta, the supply voltage, and the load resistance. The calculator then calculates the values for the base bias voltage and the collector current, which are important parameters for setting the operating point of the transistor. The calculator also calculates the gain and the output impedance of the amplifier.
One of the key benefits of using the Base or Fixed Biased BJT Amplifier Design Calculator is that it saves time and eliminates the need for manual calculations. This tool is especially useful for designers who are not familiar with the design of transistor amplifiers or who need to perform quick calculations. The calculator is user-friendly and provides accurate results, making it a valuable tool for both novice and experienced designers.
In conclusion, the Base or Fixed Biased BJT Amplifier Design Calculator is an essential tool for anyone involved in the design of transistor amplifiers. It allows the user to quickly and accurately determine the operating point of the transistor, which is critical in determining the gain and stability of the amplifier. With its user-friendly interface and accurate results, the Base or Fixed Biased BJT Amplifier Design Calculator is an indispensable tool for all electronics designers.

References and tutorials
- How to bias a BJT using base bias

Fixed Base Bias Equations:
$$\newline$$ $$R_{B}=\frac{V_{CC} -V_{BE}}{I_{B}},$$$$\\$$ $$I_{B}=\frac{I_{C}}{\beta},$$$$\newline$$ $$R_{C}=\frac{V_{CC}-V_{C}}{I_{C}}$$ $$\newline$$ $$r_{ace}=\frac{25mV}{I_{E}},$$$$\\$$ $$Z_{inb}=\beta r_{ace},$$$$\\$$ $$Z_{in}=\frac{R_{B}Z_{inb}}{R_{B}+Z_{inb}}(because \hspace{1mm} Z_{in}=R_{B}||Z_{inb}),$$$$\newline$$ $$r_{c}=\frac{R_{C}R_{L}}{R_{C}+R_{L}}(because \hspace{1mm} r_{c}=R_{C}||R_{L}),$$$$\newline$$ $$C_{1}=\frac{1}{2 \pi f 0.1 Z_{in}}(assuming \hspace{1mm} X_{C1} \leq 0.1 Z_{in}),$$$$\\$$ $$C_{2}=\frac{1}{2 \pi f 0.1 r_{c}} (assuming \hspace{1mm} X_{C2} \leq 0.1 r_{c}),$$$$\\$$ $$A_{v}=\frac{r_{c}}{r_{ace}}$$

## Self Bias(Collector Feedback Bias)

Inputs:

V
V
V
mA

Theoritical Results:

### About Self Biased BJT Amplifier Design Calculator

Self Biased BJT Amplifier Design Calculator is a tool that is used for designing a bipolar junction transistor (BJT) amplifier circuit. The tool uses a self-biasing method for the transistor, which means that the DC bias voltage and current are automatically set without the use of external resistors. This method is ideal for designing simple and easy to build amplifier circuits.
The design calculator uses a mathematical model of the BJT transistor to calculate the circuit parameters, such as the DC bias voltage, the DC bias current, and the output voltage swing. The user inputs the desired specifications, such as the desired output power, the frequency range, and the load impedance, and the calculator outputs the circuit parameters. The user can then use these parameters to build the circuit on a printed circuit board (PCB).
The self-biasing method is a simple and easy way to design an amplifier circuit, as it eliminates the need for external resistors. The use of external resistors can cause stability problems and can increase the complexity of the circuit. The self-biasing method ensures that the DC bias voltage and current are set correctly and remain stable throughout the life of the circuit.
One of the advantages of the self-biased BJT Amplifier Design Calculator is that it is easy to use. The user simply inputs the desired specifications, and the calculator outputs the circuit parameters. This eliminates the need for the user to manually calculate the circuit parameters, which can be time-consuming and prone to errors.
Another advantage of the self-biased BJT Amplifier Design Calculator is that it is flexible. The user can input different specifications and the calculator will output the corresponding circuit parameters. This makes it easy to design a range of different amplifier circuits with different performance characteristics.
In conclusion, the Self Biased BJT Amplifier Design Calculator is a useful tool for designing bipolar junction transistor amplifier circuits. It is easy to use, flexible, and eliminates the need for external resistors. Whether you are a professional engineer or an amateur hobbyist, the self-biased BJT Amplifier Design Calculator is a useful tool for designing amplifier circuits.

References and tutorials
- How to design Self Biased BJT amplifier

Self Bias(Collector Feedback bias) Equations:
$$\newline$$ $$R_{B}=\frac{V_{C} -V_{BE}}{I_{C}}$$,$$\newline$$ $$R_{C}=\frac{V_{CC}-V_{C}}{I_{C}}$$,$$\newline$$ $$r_{ace}=\frac{25mV}{I_{E}},$$$$\\$$ $$Z_{inb}=\beta r_{ace},$$$$\\$$ $$Z_{in}=\frac{R_{B}Z_{inb}}{R_{B}+Z_{inb}}(because \hspace{1mm} Z_{in}=R_{B}||Z_{inb}),$$$$\newline$$ $$r_{c}=\frac{R_{C}R_{L}}{R_{C}+R_{L}}(because \hspace{1mm} r_{c}=R_{C}||R_{L}),$$$$\newline$$ $$C_{1}=\frac{1}{2 \pi f 0.1 Z_{in}}(assuming \hspace{1mm} X_{C1} \leq 0.1 Z_{in}),$$$$\\$$ $$C_{2}=\frac{1}{2 \pi f 0.1 r_{c}} (assuming \hspace{1mm} X_{C2} \leq 0.1 r_{c}),$$$$\\$$ $$A_{v}=\frac{r_{c}}{r_{ace}}$$

## Emitter Feedback Bias

Inputs:

V
V
V
mA
V

Theoritical Results:

### About Emitter Biased BJT Amplifier Design Calculator

Emitter biased BJT (Bipolar Junction Transistor) amplifiers are one of the most commonly used amplifiers in electronics circuits. This type of amplifier is used to amplify signals from a low voltage source to a higher voltage output. The emitter biased BJT amplifier design calculator is a tool that helps designers determine the components required for the amplifier circuit. The emitter biased BJT amplifier design calculator is an online tool that can be accessed through the internet. It requires the user to input several values such as the desired biasiang point voltage and current, supply voltage, load resistance etc. The calculator then calculates the value of the required resistors, capacitors, and the transistor. The emitter biased BJT amplifier design calculator also provides the users with a visual representation of the circuit and its components. This helps designers understand the circuit and how it functions. The calculator also provides the user with a detailed list of components that are required for the circuit. The emitter biased BJT amplifier design calculator also helps designers to calculate the value of the base-emitter voltage, which is the voltage that determines the transistor’s operating point. This value is crucial in ensuring that the transistor operates within its linear range, which is essential for a linear amplifier circuit. In conclusion, the emitter biased BJT amplifier design calculator is an essential tool for electronic designers who want to design and build a reliable and efficient amplifier circuit. It saves time and eliminates the need for manual calculations, which can be time-consuming and prone to error. The tool provides designers with all the information they need to build an emitter biased BJT amplifier circuit, and it can be accessed easily and quickly through the internet.

References and tutorials
- How to design emitter biased BJT amplifier

Emitter Bias Equations:
$$r_{ace}=\frac{25mV}{I_{E}},$$$$\\$$ $$Z_{inb}=\beta r_{ace},$$$$\\$$ $$Z_{in}=\frac{R_{B}Z_{inb}}{R_{B}+Z_{inb}}(because \hspace{1mm} Z_{in}=R_{B}||Z_{inb}),$$$$\newline$$ $$r_{c}=\frac{R_{C}R_{L}}{R_{C}+R_{L}}(because \hspace{1mm} r_{c}=R_{C}||R_{L}),$$$$\newline$$ $$C_{1}=\frac{1}{2 \pi f 0.1 Z_{in}}(assuming \hspace{1mm} X_{C1} \leq 0.1 Z_{in}),$$$$\\$$ $$C_{2}=\frac{1}{2 \pi f 0.1 r_{c}} (assuming \hspace{1mm} X_{C2} \leq 0.1 r_{c}),$$$$\\$$ $$A_{v}=\frac{r_{c}}{r_{ace}}$$

## Emitter-Collector Feedback Bias

Inputs:

V
V
V
mA
V

Theoritical Results:

### About Emitter-Collector Biased BJT Amplifier Design Calculator

BJT (Bipolar Junction Transistor) amplifiers are widely used in electronic circuits for amplifying signals. One of the popular configurations in BJT amplifiers is the Collector-Emitter Feedback (CEF) biased amplifier. The CEF biased amplifier is known for its high gain and low output impedance.
Designing a CEF biased BJT amplifier requires careful consideration of various parameters such as the transistor's beta (current gain), supply voltage, load resistance, and desired gain. To make the design process easier, a Collector-Emitter Feedback biased BJT Amplifier Design Calculator can be used.
The above Emitter-Collector biased BJT amplifier design calculator calculator allows the user to input the desired biasiang point voltage and current, supply voltage, load resistance etc. Based on these inputs, it calculates the biasiang resistor values, the input and output coupling capacitors values and bypass capacitor values to bias the BJT transistor. The calculator also takes into account the transistor's beta value, which can be specified by the user.
Using the Collector-Emitter Feedback biased BJT Amplifier Design Calculator can save time and ensure that the amplifier is designed correctly. The calculator provides the user with the values of the resistors required for the CEF bias and the output load, which can be used to build the amplifier circuit.
In conclusion, the Collector-Emitter Feedback biased BJT Amplifier Design Calculator is a valuable tool for electronic engineers and hobbyists who are looking to design a high-gain BJT amplifier. By inputting the desired parameters, the calculator generates the values of the required resistors, making the design process quick and easy.

References and tutorials
- How to Design Collector-Emitter Feedback biased BJT Amplifier

Emitter-Collector Bias Equations:
$$R_{E}=\frac{V_{E}}{I_{E}},$$ $$\newline$$ $$R_{B}=\frac{V_{C}-V_{E}-V_{BE}}{I_{B}},$$$$\newline$$ $$R_{C}=\frac{V_{CC}-V_{C}}{I_{C}},$$$$\newline$$ $$r_{ace}=\frac{25mV}{I_{E}},$$$$\newline$$ $$Z_{inb}=\beta r_{ace},$$$$\newline$$ $$Z_{in}=\frac{R_{B}Z_{inb}}{R_{B}+Z_{inb}}(because \hspace{1mm} Z_{in}=R_{B}||Z_{inb}),$$$$\newline$$ $$r_{c}=\frac{R_{C}R_{L}}{R_{C}+R_{L}}(because \hspace{1mm} r_{c}=R_{C}||R_{L}),$$$$\newline$$ $$C_{1}=\frac{1}{2 \pi f 0.1 Z_{in}}(assuming \hspace{1mm} X_{C1} \leq 0.1 Z_{in}),$$$$\\$$ $$C_{2}=\frac{1}{2 \pi f 0.1 r_{c}} (assuming \hspace{1mm} X_{C2} \leq 0.1 r_{c}),$$$$\\$$ $$A_{v}=\frac{r_{c}}{r_{ace}}$$

## Voltage Divider Biased BJT Amplifier Calculator

Inputs:

V
V
V
mA
V

Theoritical Results:

### About Voltage Divider Biased BJT Amplifier Calculator

A voltage divider bias BJT amplifier calculator is a tool that helps you design and optimize bipolar junction transistor (BJT) amplifiers. This type of calculator is used to calculate the correct bias voltage for a BJT amplifier, which is an essential part of the design process. The voltage divider bias method is a commonly used technique to set the bias voltage for a BJT amplifier, and the calculator makes it easy to get the right values.
A BJT amplifier is a type of electronic amplifier that uses a bipolar junction transistor to increase the power of an input signal. The transistor acts as a switch that amplifies the input signal, increasing its voltage and current levels. To ensure that the amplifier operates correctly, the transistor must be biased at the right voltage level. This is where the voltage divider bias calculator comes in.
The voltage divider bias calculator works by determining the correct voltage level that should be applied to the base of the BJT. The base-emitter junction of the transistor must be forward-biased, meaning that the voltage level must be high enough to allow a current to flow through the junction. The voltage divider bias calculator takes into account the transistor’s characteristics and the desired bias point, and calculates the correct voltage levels for the resistors in the voltage divider circuit. Based on these inputs, it calculates the biasiang resistor values, the input and output coupling capacitors values and bypass capacitor values to bias the BJT transistor. The calculator also takes into account the transistor's beta value, which can be specified by the user.
The voltage divider bias calculator takes into account the operating or the biasing point, the base-emitter voltage of the transistor, the collector current, the load ata the output of the amplifier. Once the correct voltage levels have been calculated, the values can be used to design the voltage divider circuit. The voltage divider circuit is then connected to the base of the BJT, and the bias voltage is set.
The voltage divider bias calculator makes it easy to optimize the bias voltage for a BJT amplifier. By using the right values, the amplifier can be designed to operate at its maximum performance level, delivering high-quality audio output. Additionally, the calculator can be used to optimize the bias voltage for different types of BJT amplifiers, including common-emitter, common-base, and common-collector configurations.
In conclusion, the voltage divider bias BJT amplifier calculator is a valuable tool for anyone designing BJT amplifiers. It makes it easy to calculate the correct bias voltage and optimize the performance of the amplifier. Whether you’re a professional engineer or a hobbyist, this calculator can help you achieve the best possible results from your BJT amplifier design.

References and tutorials
- How to design BJT amplifier with Voltage Divider Biasing

Voltage Divider Bias Equations:

$$R_{1}=(\frac{V_{CC}}{V_{E}+V_{BE}})R_{2}-R_{2},$$$$\\$$ $$R_{C}=\frac{V_{CC}-V_{C}}{I_{C}},$$$$\\$$ $$R_{E}=\frac{V_{E}}{I_{E}}=\frac{V_{E}}{I_{C}}(assuming I_{E} \approx\ I_{C})$$$$\\$$ $$r_{ace}=\frac{25mV}{I_{E}},$$$$\\$$ $$Z_{inb}=\beta r_{ace},$$$$\\$$ $$Z_{in}=\frac{R_{1}R_{2}Z_{inb}}{R_{1}R_{2}+R_{1}Z_{inb}+R_{2}Z_{inb}}(because \hspace{1mm} Z_{in}=R_{1}||R_{2}||Z_{inb}),$$$$\newline$$ $$r_{c}=\frac{R_{C}R_{L}}{R_{C}+R_{L}}(because \hspace{1mm} r_{c}=R_{C}||R_{L}),$$$$\newline$$ $$C_{1}=\frac{1}{2 \pi f 0.1 Z_{in}}(assuming \hspace{1mm} X_{C1} \leq 0.1 Z_{in}),$$$$\\$$ $$C_{2}=\frac{1}{2 \pi f 0.1 r_{c}} (assuming \hspace{1mm} X_{C2} \leq 0.1 r_{c}),$$$$\\$$ $$C_{3}=\frac{1}{2 \pi f 0.1 R_{E}} (assuming \hspace{1mm} X_{C3} \leq 0.1 R_{E}),$$$$\\$$ $$A_{v}=\frac{r_{c}}{r_{ace}}$$