Basic Single Tuned Amplifier

Steve1992

Joined Apr 7, 2006
100
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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Ron H

Joined Apr 14, 2005
7,014
You're basically right, but in (3), do you think the output amplitude is a function of the input amplitude?

Steve1992

Joined Apr 7, 2006
100
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.

Ron H

Joined Apr 14, 2005
7,014
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.
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.

narayanbalaji

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

Caveman

Joined Apr 15, 2008
471
narayanbalaji,