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RF analog AC switch search - RF Cafe Forums

Because of the high maintenance needed to monitor and filter spammers from the RF Cafe Forums, I decided that it would be best to just archive the pages to make all the good information posted in the past available for review. It is unfortunate that the scumbags of the world ruin an otherwise useful venue for people wanting to exchanged useful ideas and views. It seems that the more formal social media like Facebook pretty much dominate this kind of venue anymore anyway, so if you would like to post something on RF Cafe's Facebook page, please do.

Below are all of the forum threads, including all the responses to the original posts.


 Post subject: RF analog AC switch search
Posted: Tue Nov 01, 2011 11:04 am 
 
Lieutenant
 

Joined: Tue Nov 01, 2011 10:03 am
Posts: 2
Location: Israel
Hi to all,

first of all great forum i never heard about before

i'm looking for RF ac switch w next specificatin (a bit flexible):
i would be glad if someone will be able to help me find such

- Operation frequencies: 0-20MHz

- SPST or SPDT

- Application: pass around 6W in Lo freq, block around 10mW in Hi freq

- Close/on state (when around 3Vdc applied to the switch controls):
Can pass 6Watt, 25Vac peak2peak @ < 0.5MHz (signal freq)

- Rds on: up to 200mOhm when switch is on state for minimal loss

- Open/off state (when no power applied to the switch):
Can block 25Vac peak2peak @ above 10MHz signal , w isolation around 20dB
as if Hi freq signal sees 10Kohm resister.

- Low profile: SMT part, preferably around 1mm height

- Target price: up to 2$ per unit

- i emphasise that there isn't DC supply i'm plannig to use the ac Lo freq 25Vac peak to peak for the control signal by using a bridge or a diode.and when Hi freq is in the source i plan to use no DC power at all.

i'm looking for such a long time w no sucsses :-( would be glad if someone could advice me or even declare that there is no solution

Tnx

_________________
Thanks & BR
Arye


 
   
 
 Post subject: Re: RF analog AC switch search
Posted: Wed Nov 02, 2011 10:25 am 
 
Lieutenant
 

Joined: Tue Nov 01, 2011 10:03 am
Posts: 2
Location: Israel
:-)

Some other than IC solutions may be consider such as
an ac switch made of back to back FETs
or antiserial L T topologies though w suitable FETs to block above 10MHZ signal
i.e. some GaAa transistors
Or PIN diode, etc

i would be glad to your advice





Posted  11/12/2012
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