Sensors and Interfacing
SENSORS AND INTERFACING
BY S. Muhammad Raza
RF POWER AMPLIFIER:
An RF power amplifier is a type of electronic amplifier used to convert a low-power radio-frequency signal into a larger signal of significant power, typically for driving the antenna of atransmitter. It is usually optimized to have high efficiency, high output Power(P1dB)compression, good return loss on the input and output, good gain, and optimum heat dissipation.
The basic applications of the RF power amplifier include driving to another high power source, driving a transmitting antenna and exciting microwave cavity resonators. Among these applications, driving transmitter antennas is most well known. The transmitter–receivers are used not only for voice and data communication but also for weather sensing (in the form of a RADAR).
Wideband amplifier design[edit]
Impedance transformations over large bandwidth are difficult to realize, thus most widebandamplifiers use 50 Ω output loading. Transistor output power is then limited to
is defined as the breakdown voltage is defined as the knee voltage and typically
Operational amplifier
An operational amplifier (op-amp) is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output.[1]In this configuration, an op-amp produces an output potential (relative to circuit ground) that is typically hundreds of thousands of times larger than the potential difference between its input terminals.[2]
Operational amplifiers had their origins in analog computers, where they were used to do mathematical operations in many linear, non-linear and frequency-dependent circuits. Characteristics of a circuit using an op-amp are set by external components with little dependence on temperature changes or manufacturing variations in the op-amp itself, which makes op-amps popular building blocks
BY S. Muhammad Raza
RF POWER AMPLIFIER:
An RF power amplifier is a type of electronic amplifier used to convert a low-power radio-frequency signal into a larger signal of significant power, typically for driving the antenna of atransmitter. It is usually optimized to have high efficiency, high output Power(P1dB)compression, good return loss on the input and output, good gain, and optimum heat dissipation.
The basic applications of the RF power amplifier include driving to another high power source, driving a transmitting antenna and exciting microwave cavity resonators. Among these applications, driving transmitter antennas is most well known. The transmitter–receivers are used not only for voice and data communication but also for weather sensing (in the form of a RADAR).
Wideband amplifier design[edit]
Impedance transformations over large bandwidth are difficult to realize, thus most widebandamplifiers use 50 Ω output loading. Transistor output power is then limited to
is defined as the breakdown voltage is defined as the knee voltage and typically
Operational amplifier
An operational amplifier (op-amp) is a DC-coupled high-gain electronic voltage amplifier with a differential input and, usually, a single-ended output.[1]In this configuration, an op-amp produces an output potential (relative to circuit ground) that is typically hundreds of thousands of times larger than the potential difference between its input terminals.[2]
Operational amplifiers had their origins in analog computers, where they were used to do mathematical operations in many linear, non-linear and frequency-dependent circuits. Characteristics of a circuit using an op-amp are set by external components with little dependence on temperature changes or manufacturing variations in the op-amp itself, which makes op-amps popular building blocks