Base station power supply can adjust voltage

How does a switching power supply work?

In a switching power supply, AC input is immediately converted to DC, but it is not stepped down to a lower voltage right away. The high voltage DC is fed into a switching transistor. The switch pulses or “switches” the DC on and off at a very high frequency, effectively making it AC again.

What is a base station power cabinet?

The base station power cabinet is a key equipment ensuring continuous power supply to base station devices, with LLVD (Load Low Voltage Disconnect) and BLVD (Battery Low Voltage Disconnect) being two important protection mechanisms in the power cabinet.

What is a Blvd threshold for a communication base station?

Assume the rated voltage of a communication base station’s battery is 48V, with the BLVD threshold set to 42V. When the mains power fails and the battery starts supplying power, the power system continuously monitors the battery voltage through the voltage detection circuit.

How does a linear power supply work in a ham radio?

Linear power supplies are one of the grand elders of ham radio. They’ve been around as long as radio itself. The principle of operation is fairly simple. Household AC voltage is fed to a transformer and dropped down to 12-15 volts. The low voltage AC goes through a rectifier which changes it to DC.

What happens if bias voltage is regulated?

Bias voltage variations: As the bias voltage is now regulated, we can see from equation 3 that the bias voltage variations are no longer applied on the gate. This results in a constant quiescent current at a given temperature. Note that in this case the bias voltage can be directly connected to the power supply voltage.

Are RF power amplifiers good for base station transceivers?

The performances of RF power amplifiers for base station transceivers results in a tradeoff between linearity, efficiency and gain. This tradeoff leads to an optimum quiescent current.