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Gain of power amplifiers __________ with increase in operating frequency.

Gain of power amplifiers __________ with increase in operating frequency. Correct Answer Decreases

Silicon bipolar junction transistor amplifiers in the cellular telephone band of 800-900 MHz band have power added efficiencies of about 80%. But this efficiency drops quickly with increase in the operating frequency.

Related Questions

You are given two amplifiers, A and B, to connect in cascade between a 10-mV, 100-kΩ source (S) and a 100-Ω load (L). The amplifiers have voltage gain, input resistance, and output resistance as follows: for A, 100 V/V, 10 kΩ, 10 kΩ, respectively; for B, 1 V/V, 100 kΩ, 100 Ω, respectively. Your problem is to decide how the amplifiers should be connected so that the voltage gain is maximum.
Two non-inverting amplifiers, with gain =1 and gain=20 are made using identical operational amplifiers. As compared to the unity gain amplifier, the amplifier with gain=20 has ___________
The frequency response of the filter in the stop band. i. Decreases with increase in frequency ii. Increase with increase in frequency iii. Decreases with decrease in frequency iv. Increases with decrease in frequency
Chopper stabilized dc amplifiers are complex amplifiers having ________ amplifiers incorporated in the module.
Which one of the following sets is incorrect to show the inter-relationships among price elasticity coefficient, change in price and change in total revenue ? Price elasticity coefficient Change in price Change in Total Revenue 1) Zero Increase Decrease Increase Decrease (2) Less than 1 Increase Decrease Decrease Increase (3) Equal to 1 Increase Decrease No change No change (4) More than 1 Increase Decrease Decrease Increase  
A digital CMOS IC operating at 10 MHz clock frequency consumes 100 mW power; the same IC operating at 15 MHz clock frequency consumes 140mW power. What is the static power consumption of the IC?
Select the order in which the frequency should be maintained to enhance the stability of differentiator? Where fa -> Frequency at which gain =0 ; fb -> Gain limit frequency ; fc -> Unity gain bandwidth.
In active power and frequency control, a. Frequency should remain constant b. A considerable drop in frequency could result in low magnetizing currents in induction motors and transformers. c. The frequency of a system is dependent on reactive power balance. d. Relatively closed control of frequency ensures constancy of the speed of induction motors. Which of the above statements are incorrect?
In an AM system receiver. the mixer translates the carrier frequency fc to a fixed intermediate frequency of 450 kHz. Given a broadcast signal of frequency 900 kHz. What is the corresponding image frequency when a superhetrodyne receiver is employed with local oscillator frequency greater than the broadcast signal frequency?
In order to increase the bandwidth of tuned amplifiers, one can use: 1. Tuned circuit with inductance having high Q factor 2. Double tuned amplifier with two tuned circuits coupled by mutual inductance 3. Staggered tuned amplifiers in which different tuned circuits which are cascaded are tuned to slightly different frequencies