Abstract A fixed-window level-crossing analog-to-digital converter (LC-ADC) with a single comparator is proposed for the biomedical field. In this paper, signal varying direction detection circuit to judge trend of input signal, instead low-precision in modified LC-ADC. The LC-ADC utilizes only one continuous-time multiple comparators traditional LC-ADC, leading simplified implementation and si...

The ultrastrongly coupling (USC) system has very important research significance in quantum simulation and computing. In this paper, the ultranarrow spectrum of a circuit QED with two qubits coupled to single-mode cavity is studied. regime USC, JC model breaks down counter-rotating terms Rabi Hamiltonian leads level anti-crossing energy spectrum. Choosing single-photon driving field at point av...