Analogue to digital converter for rapidly varying signals includes main sampler-blockers, and auxiliary transistor followers improving rapid sampling

摘要

The sampler-blocker comprises two main samplers. An auxiliary follower transistor (T1a, T1a') is associated with each main half-sampler-blocker. The auxiliary transistors are supplied with the voltage taken from the terminals of a storage capacitor (C',C) from the other main sampler-blocker. The auxiliary samplers improve dynamic sampling for rapidly varying signals. The sampler-blocker comprises two main samplers, each having a differential input (E,E') and a differential output (S, S'). An auxiliary half-sampler-blocker, comprising an auxiliary follower transistor (T1a, T1a') is associated with each main half-sampler-blocker. The auxiliary transistors are supplied with the voltage taken from the terminals of a storage capacitor (C',C) from the other main sampler-blocker. Auxiliary current switches (T2a, T3a, SC1a; T2a', T3a', SC1a') are controlled in synchronism with the current switch of the main sampler-blocker to authorise or block the passage of current from the auxiliary transistor follower.