  Present semiconductor research is increasingly focusing on either higher
speeds or higher linearity or both. Applications range from consumer,
industrial, healthcare and military. Typically such circuits are fabricated in
today's low-voltage CMOS processes using silicon and in few cases BJT-CMOS
combined like Gallium-Arsenide or Indium-Phosphide. These technology nodes face
a plethora of problems like reduction of dynamic range of the circuit due to
mismatch, distortion, noise, thermal and electromigration issues due to
excessive currents, etc. Compounding these problems is the issue with lower
achievable gain from an amplifier which often gets limited due to lower supply
voltages in such technology nodes. Slowly circuit techniques like chopping,
cascoding, cascading and calibration are nearing their limits. In this paper we
present a radically different approach to our regular analog design building
blocks using macroscopic quantum effects which have hitherto not found favour
with the design community. We will solely focus on the effect of
superconductivity and adopting its macroscopic phenomena to amplifiers,
integrators and comparators. Using staggered superconductors we can achieve a
gain which depends only on physical quantum constants and remains invariant
under process, temperature, supply, interference, etc. This robustness of gain
in an amplifier goes a long way in attaining higher linearity. The comparator
can resolve a minimum of 2.07fT magnetic flux but when embedded inside a
Delta-Sigma loop can typically attain 100 times smaller resolution pushing the
boundaries of sensing.
