# Basic Single Tuned Amplifier

Discussion in 'Homework Help' started by Steve1992, Mar 3, 2007.

1. ### Steve1992 Thread Starter Senior Member

Apr 7, 2006
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With ref. to attached circuit, am I right with the following statement?:

1. Amplifier load is a parallel resonant circuit.

2. Tuned to give high Z at the selected frequency, by varying C1.

3. At resonance, the current is a minimum, Voutput will be large:

Voutput = VDD - Voltage across L1,C1.

Steve

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2. ### Ron H AAC Fanatic!

Apr 14, 2005
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You're basically right, but in (3), do you think the output amplitude is a function of the input amplitude?

3. ### Steve1992 Thread Starter Senior Member

Apr 7, 2006
100
0
Thanks Ron.

The circuit is a basic A.F. amplifier - instead of a load resistor at the drain, there is the cap. Ind. parallel combination.

So the A.F. amp. calculations can be used:
Vouput = Vdd - Voltage across resistor.

4. ### Ron H AAC Fanatic!

Apr 14, 2005
7,050
657
Yeah, but doesn't the output also swing above Vdd?
Since you posted this under homework help, I'm assuming that's what it is, so I'm being coy.

5. ### narayanbalaji New Member

Apr 22, 2008
1
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hi,
can u pls say me the advantages and disadvantages of single tuned n double tuned amplifiers..

6. ### Caveman Active Member

Apr 15, 2008
471
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narayanbalaji,