Question 11.5: An amplifier has a voltage gain of 15 dB. If the input signa...

Electronic Devices and Circuits [EXP-37060]

An amplifier has a voltage gain of 15 dB. If the input signal voltage is 0.8 V, determine the output voltage.

The "Step-by-Step Explanation" refers to a detailed and sequential breakdown of the solution or reasoning behind the answer. This comprehensive explanation walks through each step of the answer, offering you clarity and understanding.
Our explanations are based on the best information we have, but they may not always be right or fit every situation.

The Blue Check Mark means that this solution has been answered and checked by an expert. This guarantees that the final answer is accurate.
Learn more on how we answer questions.

This Question has been Answered.

Already have an account?

Login

Related Answered Questions

Calculate the high 3 dB cut-off frequency fH of BJT Emitter follower as shown in Fig. 11.32, whose parameters are Cb′e = 15 pF, Cb′c = 1 pF, gm = 57.14 m mho, β = 80, Rs = 200 Ω, rb′e = 1.4 kΩ.

Verified Answer:

R_{B} = R_{1} || R_{2}= 75 × 10^{3} || 4.35...

A BJT transistor amplifier shown in Fig. 11.27 has RE = RC = 1 kΩ, RS = 600, RL = 2 k and transistor parameters as β = 100 and rπ = 1 kΩ. Determine the values of CC1, CC2 and CE needed to obtain fL = 50 Hz.

Verified Answer:

\omega _{1p} = 2 \pi f_{L} = 100 \pi rad...

An RC-coupled amplifier has equal input and output-circuit corner frequencies in the high-frequency band as given by ω21 = ω22 = ω2 = 250 × 10^3 rad/s Calculate the cut-off frequency of this band.

Verified Answer:

A_{VH}= \frac{A_{V0} }{1+j(\omega /\omega _...

A silicon BJT small signal amplifier shown in Fig. 11.28 has the circuit parameters as follows: VCC = 10 V, R1 = 11.5 kΩ, R2 = 41.4 kΩ, RC = 5 kΩ, RE = 1 kΩ Rs = 1 kΩ, CE = 150 μF, CC1 = CC2 = 20 μF and β = 50 Cπ = 100 pF, Cμ = 5 pF, CW + CL = 5 pF and RL = 10 kΩ. Determine (a) dc bias values (b)

Verified Answer:

(a) To determine dc bias values:

R_{B} = R_...

Calculate the coupling capacitor CC required in Fig. 11.20 to provide a low frequency 3 dB point at 125 Hz if Rs = 600 Ω, hie = 1 kΩ, hfe = 60, R1 = 5 kΩ and R2 = 1.25 kΩ. For (a) an ideal bypass capacitor CE, (b) a practical bypass capacitor with RCE = 25Ω.

Verified Answer:

The lower 3 dB frequency,

f_{1}=\frac{1}{2\...

Consider a cascode amplifier with transistor and the circuit parameters are rπ = 2 kΩ, gm = 0.05 Ω, = 100, Cπ = 19.5 pF, Cμ = 0.5 pF, Rs = 300 Ω and RC = 1.5 kΩ. Determine fH and mid-band gain G of cascode amplifier and CE amplifier.

Verified Answer:

Here,

R^{'}_{s} = R_{s} || r_{\pi} = 300 ||...

A certain BJT transistor has rπ = 2 kΩ and β = 100 at 1 MHz and β = 5 at 20 MHz. Determine the value of fT, f, and Cπ.

Verified Answer:

We know that

f_{T}=\beta f_{\beta }=\beta _...

A BJT has gm = 38 mhos, rb’e = 5.9 kΩ, hie = 6 kΩ, rbb’ = 100Ω, Cb’c = 12 pF, Cb’e = 63 pF, and hfe = 224 at 1 kHz. Calculate α and β cut-off frequencies and fT.

Verified Answer:

f_{\alpha } \approx \frac{h_{fe}}{2\pi r_{b...

A certain BJT transistor has rπ = 2 kΩ and β = 100 at 1 MHz and β = 5 at 20 MHz. Determine the values of fT, fβ and Cπ .

Verified Answer:

We know that

f_{T}=\beta f_{\...

A BJT has hie = 6 kΩ and hfe = 224 at IC = 1 mA, with fT = 80 MHz and Cb’c = 12 pF. Determine (a) gm (b)rb’e (c) rbb’ and (d) cb’e at room temperature and a collector current of 1 mA. Determine the parameters, gm, rb’e rbb’ and Cb’e of the small signal high frequency model of the BJT.

Verified Answer:

g_{m}=\frac{I_{C}(mA)}{26 mV}=\frac{1}{26}...