US 10,651,808 B2 · Compound superconducting quantum interference device output amplifier and methods

Abstract

Output amplifier comprising a stack of compound superconducting quantum interference device (SQUID) output amplifier stages and related methods are provided. A method includes receiving a first pulse train comprising a first plurality of single flux quantum (SFQ) pulses. The method may further include receiving a second pulse train comprising a second plurality of SFQ pulses, where the second pulse train is delayed by a predetermined fraction of a clock cycle relative to the first pulse train. The method may further include using the stack of the plurality of compound SQUID output amplifier stages converting the first plurality of SFQ pulses and the second plurality of SFQ pulses into a voltage waveform, where each of the plurality of compound SQUID output amplifier stages comprises a pair of superconducting quantum interference devices (SQUIDs).

Claims20

Dependent claims

An output amplifier stage comprising:

a first terminal for receiving a first pulse train;
a second terminal for receiving a second pulse train, wherein the second pulse train is delayed by a predetermined fraction of a clock cycle relative to the first pulse train;
a first inductor coupled between the first terminal and a third terminal;
a first Josephson junction coupled between the first terminal and the third terminal;
a second inductor coupled between the second terminal and a fourth terminal;
a second Josephson junction coupled between the second terminal and the fourth terminal, wherein each of the third terminal and the fourth terminal is a around terminal;
and
a compound superconducting quantum interference device (SQUID) configured to convert the first pulse train and the second pulse train into a non-return-to-zero (NRZ) voltage waveform.

5 more elements

Dependencies are inferred from the claim text.

Compound superconducting quantum interference device output amplifier and methods

Life of this patent

Compound superconducting quantum interference device output amplifier and methods

Life of this patent

Abstract

Claims20