FEMTOVOLTMETER AND VOLTAGE TUNABLE HETERODYNE RECEIVER BASED ON THE dc RESISTIVE SQUID

摘要

A voltmeter with femtovolt sensitivity, δVrms = 1 x 10-l5 V/(Hz)1/2, (i.e., 1 fV/ (Hz)1/2) and a voltage tunable far infrared heterodyne receiver, with intrinsic frequency resolution of 0.5 Hz at signal frequency 0.7 x 1012 Hz (0.7 THz) and a second power conversion efficiency of 0.2, were constructed on the basis of a dc resistive SQUID.