IJSRP, Volume 9, Issue 5, May 2019 Edition [ISSN 2250-3153]
Thit Waso Khine
Amplifiers are classified as untuned (wide band) amplifiers and tuned (narrow band) amplifiers based upon their bandwidth. Untuned amplifiers will provide the constant gain over a limited band of frequencies i.e., from lower to upper cut-off frequency. Tuned amplifiers will amplify signals of only fixed frequency of which is equal to the resonant frequency of the tuned circuit LC. In this paper, firstly, a basic small-signal (untuned) amplifier is designed as a swamped amplifier which is commonly used in electronic devices to use as a preamplifier.