UHF op-amps?

[Paul Burridge]

Sorry for posting another *dumb* question about op-amps but as I've
said before, I've always tried to avoid them where possible..
Are there any readily avaiable devices that will give a voltage gain
of say <4 at 500Mhz?
Thanks,

p
--

The BBC: Licensed at public expense to spread lies.

 

[Leon Heller]

"Paul Burridge" <pb@osiris1.notthisbit.co.uk> wrote in message
news:h4ib50d7oekjbr85o92ia28j704bqv1f5b@4ax.com...

Sorry for posting another *dumb* question about op-amps but as I've
said before, I've always tried to avoid them where possible..
Are there any readily avaiable devices that will give a voltage gain
of say <4 at 500Mhz?

An MMIC will be much easier to use, but will give you a lot more gain than
you need. You could always attenuate the output.

Leon

 

[Frank Raffaeli]

Paul Burridge <pb@osiris1.notthisbit.co.uk> wrote in message news:<h4ib50d7oekjbr85o92ia28j704bqv1f5b@4ax.com>...

Sorry for posting another *dumb* question about op-amps but as I've
said before, I've always tried to avoid them where possible..
Are there any readily avaiable devices that will give a voltage gain
of say <4 at 500Mhz?
Thanks,

p

I know this doesn't answer the question Paul, but is there some reason
not to use a BJT? Is the application narrowband or wideband? A BJT can
do narrowband best, but single-stage wideband gain of 12dB (4x) or
more is possible with a hobbyist's style tools and components. The
high GBW opamps I know about are difficult to stabilize above 300 MHz
or so.

Frank Raffaeli

 

[Paul S]

Paul Burridge <pb@osiris1.notthisbit.co.uk> wrote in message news:<h4ib50d7oekjbr85o92ia28j704bqv1f5b@4ax.com>...

Sorry for posting another *dumb* question about op-amps but as I've
said before, I've always tried to avoid them where possible..
Are there any readily avaiable devices that will give a voltage gain
of say <4 at 500Mhz?
Thanks,

p

Can you use a current-feedback part? I've seen some new parts
advertized by Intersil with pretty nice numbers. The EL5167 says it
will give gain-of-2 at 800 MHz. Never used one, but it looks good on
paper. (For what that's worth.)

Paul

 

[John Larkin]

On Mon, 15 Mar 2004 15:18:31 +0000, Paul Burridge
<pb@osiris1.notthisbit.co.uk> wrote:

Sorry for posting another *dumb* question about op-amps but as I've
said before, I've always tried to avoid them where possible..
Are there any readily avaiable devices that will give a voltage gain
of say <4 at 500Mhz?
Thanks,

p

THS4302 has a fixed gain of +5 at a bandwidth of 2.4 GHz. We were just
playing with the eval board this morning, and it's beautiful: clean,
stable, makes very pretty 150 ps risetime edges. But the package is
insane.

Analog Devices or somebody has a 1.4 GHz current-mode amp, too.

Remember: there are no dumb questions, just dumb people.

John

 

[Paul Burridge]

On Mon, 15 Mar 2004 17:30:50 -0800, John Larkin
<jjlarkin@highSNIPlandTHIStechPLEASEnology.com> wrote:

THS4302 has a fixed gain of +5 at a bandwidth of 2.4 GHz. We were just
playing with the eval board this morning, and it's beautiful: clean,
stable, makes very pretty 150 ps risetime edges. But the package is
insane.

Insane? In what way?

Analog Devices or somebody has a 1.4 GHz current-mode amp, too.

Remember: there are no dumb questions, just dumb people.

Fair point.
--

The BBC: Licensed at public expense to spread lies.

 

[John Larkin]

On Tue, 16 Mar 2004 13:02:50 +0000, Paul Burridge
<pb@osiris1.notthisbit.co.uk> wrote:

On Mon, 15 Mar 2004 17:30:50 -0800, John Larkin
jjlarkin@highSNIPlandTHIStechPLEASEnology.com> wrote:

THS4302 has a fixed gain of +5 at a bandwidth of 2.4 GHz. We were just
playing with the eval board this morning, and it's beautiful: clean,
stable, makes very pretty 150 ps risetime edges. But the package is
insane.

Insane? In what way?

Try soldering one to a board and see.

John

 

[Paul Burridge]

On Tue, 16 Mar 2004 07:59:55 -0800, John Larkin
<jjlarkin@highlandSNIPtechTHISnologyPLEASE.com> wrote:

On Tue, 16 Mar 2004 13:02:50 +0000, Paul Burridge
pb@osiris1.notthisbit.co.uk> wrote:

On Mon, 15 Mar 2004 17:30:50 -0800, John Larkin
jjlarkin@highSNIPlandTHIStechPLEASEnology.com> wrote:

THS4302 has a fixed gain of +5 at a bandwidth of 2.4 GHz. We were just
playing with the eval board this morning, and it's beautiful: clean,
stable, makes very pretty 150 ps risetime edges. But the package is
insane.

Insane? In what way?


Try soldering one to a board and see.

Oh, I see.
BTW, has there been a documented case yet of anyone accidentally
inhaling an SMD - and realising it?
--

The BBC: Licensed at public expense to spread lies.

 

[Wayne Shanks]

Paul Burridge wrote:

Sorry for posting another *dumb* question about op-amps but as I've
said before, I've always tried to avoid them where possible..
Are there any readily avaiable devices that will give a voltage gain
of say <4 at 500Mhz?
Thanks,

p

I just saw a proguct anouncment for a voltage mode Op-Amp with a Unity
Gain Bandwidth of 2.4 GHz, and 4 nV/rootHz input voltage noise.

I forget the other parameters, and the maker, but it was in EE-Products
Magazine last week.

Wayne S