Problem 1. One page of the datasheet of MAAM -011109 is posted. That is a RF amp

Question

Problem 1. One page of the datasheet of MAAM -011109 is posted. That is a RF amplifier. The information that you need are highlighted and added as notes to the posted datasheet.

a)      What is the linear voltage gain of the amplifier?

b)      What is the maximum output power (PL) of the amplifier? (Hint: convert dBm to mW)

c)      How much power (Pdc) is needed from the power supplies to run one amplifier?

d)     Find the theoretical largest amplitude of the output of this amplifier when no load is connected to the input.

e)      For case d, find the largest amplitude at the input that guarantees linear operation of the amplifier.

f)       Considering the answer of part (b) and (c) find the power efficiency in the amplifier.

If you are asked to design an amplifier circuit to amplify a source signal of

Vs= 50mV*Sin(t) to at least Vout =2.0 V*Sin(t) for a load resistance of 50 ohm

g)      Find how many amplifiers has to be connected in a cascade configuration? (you may need to add an external resistor to the circuit to get the exact gain)

h)      What would be the total power consumption in the whole circuit? Do you recommend any ventilation or cooling system?

i)        For what range of frequency does your design work?

j)        What would be Rin for your design?

k)      What would be Rout for your design?

Please help!

Explanation / Answer

(a) voltage gain of the amplifier = 13 dB = 10(13/20) = 4.4668

(b) Output = 18 dBm = 10(18/10) x 1 mW = 63.0957 mW.

(c) Pdc = Vcc(Icc) + Vee(Iee) = 5(.190) + 5(.190) = 1.90 W.

(d) Ouput when no load = 22 dBm = 10(22/10) x 1 mW = 158.4893 mW.

(e) Largest amplitude at the input for linear opreation = 17 dbm = 10(17/10) x 1 mW = 50.1187 mW.

(f) Power efficiency (in %) = ( Output Power / Input Power) x 100 = ( 158.4893 mW / 950.0000 mW) x 100 = 16.6831 %.

(g) Voltage Gain of One Amplifier = 4.4

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