On Mon, 01 Sep 2003 14:16:51 +0100, Paul Burridge
wrote:


Is a tuned load (tank circuit) a viable load for an RF amplifier
operating in class A? Or is this type of load only really suitable for
class C?

Of course you can use a tuned load with class A. But the nice thing
about a tuned load is that you don't *have* to use class A to achieve
a clean output. Of course, if you are using an amplitude modulated
signal, then you will need class A.

d

_____________________________

http://www.pearce.uk.com

Don Pearce wrote:
On Mon, 01 Sep 2003 14:16:51 +0100, Paul Burridge
wrote:


Is a tuned load (tank circuit) a viable load for an RF amplifier
operating in class A? Or is this type of load only really suitable
for class C?

Of course you can use a tuned load with class A. But the nice thing
about a tuned load is that you don't *have* to use class A to achieve
a clean output. Of course, if you are using an amplitude modulated
signal, then you will need class A.

That is, if the input signal is already AM, you need a class A or linear
amplifier. If the AM is to be done at that stage itself, then its the
class c non-linear bit that makes the multiplication modulation work.

Kevin Aylward

http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.

On Mon, 01 Sep 2003 14:16:51 +0100, Paul Burridge
wrote:


Is a tuned load (tank circuit) a viable load for an RF amplifier
operating in class A? Or is this type of load only really suitable for
class C?

Of course you can use a tuned load with class A. But the nice thing
about a tuned load is that you don't *have* to use class A to achieve
a clean output. Of course, if you are using an amplitude modulated
signal, then you will need class A.

d

_____________________________

http://www.pearce.uk.com

Don Pearce wrote:
On Mon, 01 Sep 2003 14:16:51 +0100, Paul Burridge
wrote:


Is a tuned load (tank circuit) a viable load for an RF amplifier
operating in class A? Or is this type of load only really suitable
for class C?

Of course you can use a tuned load with class A. But the nice thing
about a tuned load is that you don't *have* to use class A to achieve
a clean output. Of course, if you are using an amplitude modulated
signal, then you will need class A.

That is, if the input signal is already AM, you need a class A or linear
amplifier. If the AM is to be done at that stage itself, then its the
class c non-linear bit that makes the multiplication modulation work.

Kevin Aylward

http://www.anasoft.co.uk
SuperSpice, a very affordable Mixed-Mode
Windows Simulator with Schematic Capture,
Waveform Display, FFT's and Filter Design.