| 摘要 |
<p>The invention relates to samplers-blockers, particularly those arranged upstream from an analog-digital converter. A sampler-blocker traditionally includes a differential pair of transistors (T1, T2), a follow-up transistor (T3) and a storage capacity C<SUB>ech</SUB>. The follow-up transistor is made con0ducting during a sampling phase by the application of an emitter current using a first current switch (T4, T7), and can be blocked during a blocking phase by the application of a blocking voltage at its base. The sampler-blocker of the invention operates with a blocking phase (HB) starting simultaneously with the end of a sampling phase (HE) and ending before the beginning of a new sampling phase. It is thus possible to avoid switching peaks between the end of a blocking phase and the beginning of a new sampling phase.</p> |
