公开(公告)号：US20150061912A1

公开(公告)日：2015-03-05

申请号：US14476638

申请日：2014-09-03

Applicant: Infineon Technologies AG

Inventor： Emanuele BODANO ,  Peter BOGNER ,  Joachim PICHLER ,  Mark SCHAUER

IPC: H03M1/00 ,  H03M1/38

CPC classification number: H03M1/002 ,  G05F1/575 ,  H03M1/38 ,  H03M1/44 ,  H03M1/46 ,  H03M1/802

Abstract: A circuit contains a successive approximation register and an adjustable capacitor with a set input for adjusting a capacitance value of the adjustable capacitor. Moreover, it comprises a comparator having an input coupled to a terminal of the adjustable capacitor, and with an at least one output, wherein at least one of the outputs of the comparator is coupled to an input of the successive approximation register. The circuit also includes an analog input which is coupled to a terminal of the adjustable capacitor. The circuit may be set into a first operating state and a second operating state, wherein an output of the circuit is controlled in the first operating state by the successive approximation register and is not controlled in the second operating state by the successive approximation register, but by the comparator.

Abstract translation: 一个电路包含一个逐次逼近寄存器和一个带可调电容器的可调电容器，用于调节可调电容器的电容值。 而且，它包括比较器，其具有耦合到可调电容器的端子的输入端和至少一个输出端，其中比较器的输出中的至少一个耦合到逐次逼近寄存器的输入端。 电路还包括耦合到可调电容器的端子的模拟输入端。 电路可以被设置为第一操作状态和第二操作状态，其中电路的输出由逐次逼近寄存器控制在第一操作状态，并且在逐次逼近寄存器中不被控制在第二操作状态，但是 由比较方。