Radio frequency broadband low noise amplifier LNA (0.1-2000 MHZ gain 30 db)

Some of the amplifier using techniques:

1) when the working frequency is less than 500 MHZ, the amplifier has the very good gain flatness, careful adjustment can be less than 1 db.The low frequency gain high consistency.2) the work frequency of the lower limit is subject to the amplifier input and output capacitor, the default is 0.1 uF, working to 0.1 MHz.Can increase the input and output capacitance appropriately, to extend the cut-off frequency, such as: 10 uf, can work to 5 KHZ.If you need detailed calculation, need to pay attention to the input and output impedance for 50 euro, calculate the capacitance value, at the same time, should strengthen the power supply decoupling and voltage stability.3) when the power supply voltage changes in 5-8 v, can be used as a variable gain amplifier, gain increases with the increase of the power supply voltage.Very suitable for rf receive front-end circuit, using DA control power supply voltage, to control the gain of the amplifier, automatic gain control.4) when the power supply voltage in the 8-10 v, the low frequency end up to 30 db gain, where the amplifier with low noise coefficients and good stability.5) when the voltage is 12 v, gain value, the low-frequency gain of 32.5 dB.

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