The AVMP series of pulse generators offer 5V, 10V, and 20V outputs with sub-nanosecond rise times, and pulse widths variable from several nanoseconds to 100 ns, 1 us, or 10 us.
The 5 Volt AVMP-1A family provides 100 ps rise times and 135 ps fall times. The pulse width can be varied from 5 to 100 ns. The AVMP-2 family is similar, but offers amplitudes up to 10 Volts. Both families operate to 1 MHz.