I want to use a very fast Spdt Rf switch Masw20000 and want to control it through Fpga.it has two control signal inputs A and B. The control signals required for this switch are 0V and -5V for switching of one state and -5v and 0v for switching to other state.
The problem is that i cannot provide -5v from fpga.
One solution is to use an inverter but its responce is slow.
I want to genarate control signals 0v and -5v within 1ns.
If Any idea or solution

 

Here's the LTspice simulation of a common-base PNP level shifter which may meet your needs.

Note that the transistor must be a device designed for fast saturated switching (no 2N3906 or similar general purpose transistors) and the input must be a high speed, fast rise-time driver circuit capable of driving an 80Ω load at 0-5V or a 42Ω load at 0-3V.

 

Here's the LTspice simulation of a common-base PNP level shifter which may meet your needs.

Note that the transistor must be a device designed for fast saturated switching (no 2N3906 or similar general purpose transistors) and the input must be a high speed, fast rise-time driver circuit capable of driving an 80Ω load at 0-5V or a 42Ω load at 0-3V.


View attachment 243158

Thanks for reply
Most BJTs like above you have used(2N5771) has on and off time around 10 to 15 ns. I think this time will effect the switching speed

 

Most BJTs like above you have used(2N5771) has on and off time around 10 to 15 ns

The 2N5771 is not like most (general purpose) BJTs, it is a very fast switch.
As you can see from the simulation, the 2N5771 operates in about 1ns in that circuit.

 

Thanks for reply
Most BJTs like above you have used(2N5771) has on and off time around 10 to 15 ns. I think this time will effect the switching speed

You are falling victim to misleading datasheet parameters. Look at the currents involved for the datasheet value. Then look at the currents in the simulation. It is a world of difference.