Check out the LT3045-1. It is an ultra low noise (2nv) linear regulator with very high PSRR that has a 1 MHz bandwidth. The -1 version can control an external switcher (or linear) regulator ahead of it, where the voltage drop across the LT3045-1 can be set to, say 1V, and the front end supply output voltage automatically is 1V above the LT3045-1 output voltage. It has 120 dB PSRR at 120 Hz. You can buy an eval board for it. Multiple LT3045's can be paralleled for additional current handling. If the switcher is of the isolated type, you have galvanic isolation for the ultimate OCXO performance.
I think the vendor really got this right. Rick N6RK _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.