Here is a high performance RF amplifier using MAX2633 for the entire VHF band that can be successfully built without any special test equipment. The grounded -gate configuration is inherently stable without any neutralisation if reasonably good layout techniques are employed. The performance of the amplifier is quite good. The noise figure is below 2dB and the gain is over 13dB.
The low noise figure and good gain will help car radios or home stereo receivers pick up those weak distant stations or the lower power ‘talk radio’ and university stations or distant amateur VHF stations.
FM receivers lose signals abruptly, so if your favourite station fades in and out as you drive, this amplifier can have a dramatic effect.
The MAX2633 is a low voltage, low-noise amplifier for use from VHF to microwave frequencies. Operating from a single +2.7V to +5.5V supply, it has a flat gain response to 900MHz.Their low noise figure and low supply current make them ideal for receive, buffer, and transmit IF applications. The MAX2633 is biased internally, has a user-selectable supply current, which can be adjusted by adding a single external resistor (R1).
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