Description and VHF radio single-chip preamplifier circuit Schematic



Here's the full broadcast PMR VHF band (100-175 MHz and above) is a special test equipment, it successfully with high efficiency RF amplifiers can be set. You if you are using the proper PCB layout techniques grounded gate structure, dimensional stability is not a very good efficiency of the amplifier.

A gain of about 2dB noise level is less than 13dB. Campus radio station or a car radio or stereo receiver to help local or remote station down two measures amateur VHF band low noise and good profits. Your favorite stations inside and outside the hide, so if the drive amplifier, which can lead to dramatic improvements in the so-called threshold effect, because FM radio, a sudden loss of received signal.

MAX2633 VHF-SHF frequency for the low-voltage, low-noise amplifier. +2.7 V ~ +5.5 V supply voltage of the single-pole, 900 MHz almost flat gain response. Low noise and low power consumption, the total amount of transmission and radio frequency for receiving applications is ideal. MAX2633 inside, the choice of the user to combine the current external resistor (R1) can be set to the circuit consumes 3mA.
VHF RF preamplifier circuit

VHF RF Single-Chip Preamplifier circuit with explanation

Another simple external biasing components to lock and VCC bypass capacitor MAX2630 RF amplifier and the output capacitor, the family C1 and C3 can be used on, C2 is required. Coupling capacitor to bypass the resistance of 50-O system, contributing to low operating frequency must be large enough. To calculate the minimum value using the following formula:

CC = 53000 / Traffic [PF]
If you want to report any meterial please