Analysis of information sources in references of the Wikipedia article "Trillion-dollar coin" in English language version.
In the 1980s, a chairman of the Coinage Subcommittee of the U.S. House of Representatives pointed out that the ... entire national debt could be extinguished with a single coin minted by the U.S. Mint, stamped with the appropriate face value.
In economic terms the Fed's purchase would resemble "quantitative easing" (QE), in which it prints money to buy bonds ... does not become part of the monetary base until the Treasury spends it, and it ends up in a commercial bank's reserves at the Federal Reserve.