BAS85 L0G

BAS85 L0G Application Field and Working Principle

BAS85 L0G is a class of plug-in logarithmic amplifiers and detectors used in a wide range of applications. These amplifiers and detectors are designed to work with moderate voltages, usually no more than +-10V. When used in extreme conditions (high temperature and/or high voltage), the plug-in series is recommended for longer operational life and higher reliability.

BAS85 L0G amplifiers and detectors can be used for a variety of applications, from antenna matching and gain control to frequency modulation and low noise amplification. The purpose of this article is to discuss the application field and working principle of BAS85 L0G logarithmic amplifiers & detectors.

Application Field of BAS85 L0G

The application field of BAS85 L0G is quite broad and includes many different areas:

• Radio receivers
• Audio amplifiers
• Gain control
• Antenna matching
• FM modulation
• RF filters
• High voltage measurement
• Low noise amplification

In radio receivers, the BAS85 L0G provides gain control, allowing the radio to adjust the strength of the incoming signals. This increases radio reception sensitivity, allowing the radio to receive weaker signals more effectively. Additionally, it can provide frequency modulation (FM) for transmitting stations.

In audio amplifiers, BAS85 L0G provides higher dynamic range, as well as a logarithmic response which is better suited to a wider range of frequencies. Gain control allows the amplifier to adjust the strength of incoming signals, while low noise amplification will improve sound quality.

In antenna matching and RF filter circuits, the BAS85 can be used to match the impedance of the antenna to the receiver, as well as filter out unwanted signals at specific frequencies.

Working Principle of BAS85 L0G

The working principle of the BAS85 L0G is based on the injection of a logarithmic current into the circuit with a single-pole double throw switch. The BAS85 L0G uses a two-stage operating technique, to minimize the impact of temperature variation.

The first stage is the logarithmic current injection, which is generated by a high gain operational amplifier. The amplitude of this current is proportional to the input signal, allowing for precise control of the logarithmic response. Next, the low power control stage is used to monitor the supply voltage of the amplifier and detector. This allows the logarithmic response to be adjusted in order to compensate for variations in temperature.

The combination of the high gain operational amplifier and low power control stage allows the BAS85 to produce an accurate logarithmic response in a wide range of applications.