# 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

#### 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,

Why didn't you just start your own thread?