RF switch

[abhijitrkjr]

Hi. I want to make an rf switch. I have two rf signal inputs and one output. I want to channel one of the inputs to the output using a TTL. The frequency range of my rf signal is 2kHz-1MHz and amplitude is 10V peak to peak. Any ideas how can I achieve it?

[themadhippy]

simplest way would be a relay

[G0HZU]

CD4066 or CD4053 ? You would have to add a level shifter from TTL to the required control voltage for the CD4066 or 4053 when running it from about 15V. I think it can cope with 10V pkpk at 1MHz but I can’t be certain.

[abhijitrkjr]

I want the switching speed to be in microsecond. Relay switches are slower

[ArdWar]

Switching 1MHz at microseconds is a bit redundant, no?

1MHz isn't that high of a frequency. Almost any CMOS analog switches can do that (and more). Maybe [A]DG419 if you only want SPDT and no need for T switches or unused input termination.

[Solder_Junkie]

I have used a 4066 to route RF in a home made transceiver where the frequencies involved were up to 20 MHz. The switching capability is +/-7.5V and switch times of a few nS.

Data sheet: https://www.ti.com/lit/ds/symlink/cd4066b.pdf

SJ

[Infraviolet]

Doesn't the 4066 give quite a spike/dip (of a few tens to hundreds of nanoseconds length) on the passed-through signal whenever you switch it? So if you're only switching infrequently you're fine, but if you're switching very often you'll find these spikes replacing non-insigificant perods worth of the signal you're switching.

[geggi1]

look in to FET rf switches.

[Zero999]

I want the switching speed to be in microsecond. Relay switches are slower

What's the load?