Analog Circuits Mastery : From Fundamentals to IC Design-I

Analyze the frequency response of a BJT in a common-emitter amplifier, showing how bypass capacitors and external capacitances affect gain and define the 3 dB lower and upper cutoffs.

Explore the frequency response of a BJT circuit, distinguishing internal and external capacitances at low, mid, and high frequencies, and calculate 3 dB frequency from time constants and r equivalent.

Learn to calculate the lower cut off frequency of a bjt amplifier using a small signal model and three capacitors, evaluating each and taking the maximum.

Derive the lower cut-off frequency of a common emitter amplifier by building its small signal model, grounding DC sources, shorting capacitors, and finding the equivalent resistance seen by the capacitance.

Compute the lower cut-off (3dB) frequency by finding r_naught, r_naught_dash, RC, RL, and r_pi/(1+gm r_pi), then use f_3db = 1/(2π times the capacitance times the equivalent resistance).

Examine how emitter bypass capacitance contributes to the 3dB frequency by deriving the equivalent resistance, including gm, r pi, rs, and r1 r2. Thus emitter bypass dominates the lower cutoff.

Calculate the lower cut-off frequency of a transistor amplifier by assessing emitter bypass capacitance, with DC analysis to determine gm and r_pi, and evaluate base and collector capacitances' influence.

Apply the Thevenin equivalent and DC analysis to a voltage divider biased transistor circuit to determine the lower cutoff frequency from base, collector, and emitter capacitances.

Analyze the high frequency behavior of the BJT by integrating diffusion and depletion capacitances into the hybrid pi model, introducing c_mu and c_p.

Apply Miller's theorem to a capacitance between input and output in a common emitter amplifier, splitting it into input and output parts using the midband gain av.

Explore the frequency behavior of a common emitter amplifier, detailing lower and upper cutoff frequencies, emitter node impedance, time-constant based high-frequency limits, and practical implications for bandwidth and gain.

Solve a high-frequency BJT numerical by calculating input and output time constants from capacitances and resistances, then determine c_mu, c_pi, diffusion capacitance, gm, and the upper cutoff frequency.

Explore the lower and upper cut-off frequencies and mid-band gain of a common emitter amplifier through a numerical problem, dc analysis, Thevenin analysis, and LTspice simulation.

Analyze a common-emitter amplifier using the small-signal model, derive gain from gm and ro, and verify with LTspice simulations, including beta setting in the transistor model.

Learn to calculate the lower cutoff frequency of a CE amplifier by summing each capacitance's contribution via r equivalents, with LTSpice validation, and mid band gain around 50.

Explains the upper cutoff frequency of a BJT common-emitter amplifier using CBe, Cmu, Cjs and the Miller effect to compute input and output capacitances, validated by simulation around 1.1 MHz.