Title :
DC-to-20-GHz MMIC multibit digital attenuators with on-chip TTL control
Author :
Khabbaz, Brian ; Pospishil, Anthony ; Singh, H.P.
Author_Institution :
ITT Avionics, Clifton, NJ, USA
Abstract :
Broadband digital attenuators (DC to 20 GHz) featuring on-chip translators for direct TTL control have been designed and fabricated for MMIC insertion into advanced EW systems. The MMIC digital attenuators utilize a novel distributed topology to provide exceptional performance parameters include through-state insertion losses of less than 5 dB for a 4-b attenuator, 4 dB for a 2-b attenuator, 2 dB for a switched attenuator, and normalized mean attenuation accuracies within 0.5 dB from DC to 20 GHz for each attenuator. When cascaded, this set of digital attenuators provides the high-dynamic range (>75 dB) required for advanced EW system applications.<>
Keywords :
MMIC; attenuators; digital integrated circuits; field effect integrated circuits; 0 to 20 GHz; 2 to 5 dB; EW system applications; MMIC; broadband; direct TTL control; distributed topology; multibit digital attenuators; on-chip TTL control; wideband type; Attenuation; Attenuators; Control systems; MESFETs; MMICs; Radio frequency; Switches; System-on-a-chip; Topology; Voltage control;
Journal_Title :
Solid-State Circuits, IEEE Journal of
