Which of the following AM-scheme requires the minimum transmitted power & minimum channel bandwidth?

Options

A. VSB
B. DSB-SC
C. AM
D. SSB

Explanation

To solve the question "Which of the following AM-scheme requires the minimum transmitted power & minimum channel bandwidth?", we will analyze the different types of Amplitude Modulation (AM) schemes.

### Step-by-Step Solution:

1. **Understanding AM Schemes**:
- There are different types of AM schemes, namely:
- DSB (Double Sideband)
- SSB (Single Sideband)
- VSB (Vestigial Sideband)

2. **Analyzing DSB (Double Sideband)**:
- DSB transmits both the upper and lower sidebands of the carrier frequency.
- This requires more power as both sidebands are transmitted.
- Bandwidth required is twice the modulating frequency.

3. **Analyzing VSB (Vestigial Sideband)**:
- VSB transmits one complete sideband and a portion of the other sideband.
- It is more efficient than DSB in terms of power and bandwidth but still requires more than SSB.

4. **Analyzing SSB (Single Sideband)**:
- SSB transmits only one of the sidebands (either upper or lower) and suppresses the carrier.
- This results in the minimum transmitted power since only one sideband is sent.
- The bandwidth required is also the minimum, being equal to the modulating frequency.

5. **Conclusion**:
- Among the three AM schemes discussed, SSB (Single Sideband) requires the minimum transmitted power and minimum channel bandwidth.

### Final Answer:
The AM scheme that requires the minimum transmitted power and minimum channel bandwidth is **SSB (Single Sideband)**.

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