发明名称 APPARATUS AND METHODS FOR CONTROLLING OVERSHOOT IN DIGITAL STEP ATTENUATORS
摘要 Apparatus and methods for controlling overshoot in digital step attenuators are disclosed. By configuring a multi-bit DSA such that an attenuation control block changes a plurality of control signals in a manner preventing a series cascade of attenuation units from having a transient attenuation value less than an initial and final value of attenuation, an overshoot condition can be prevented. Control signals transition the attenuation units to a first state of attenuation before they transition attenuation units to a second state of insertion.
申请公布号 US2016112026(A1) 申请公布日期 2016.04.21
申请号 US201514724731 申请日期 2015.05.28
申请人 Analog Devices Global 发明人 Kocer Fatih
分类号 H03H7/25 主分类号 H03H7/25
代理机构 代理人
主权项 1. An attenuator component comprising: a plurality of attenuator units each having an attenuation value that define a range of attenuation values, wherein some of the attenuation values comprise higher attenuation values and some of the attenuation values comprise lower attenuation values, wherein the plurality of attenuator units are coupled together so as to receive an input and an output signal that has a final attenuation value, and wherein each of the plurality of attenuator units has a first state where a first attenuation value is applied to an input signal to produce a first output, and a second state where a second attenuation value is applied to an input signal to produce a second output, wherein the first attenuation value is greater than the second attenuation value; and a control unit that in response to a logic signal selecting a final attenuation value, provides control signals to the plurality of attenuation units so that the plurality of attenuation units are placed into either the first state or the second state, wherein the control unit induces selected ones of the plurality of attenuation units having higher attenuation values to enter the second state after selected ones of the plurality of attenuation units having lower attenuation values enter the first state so as to reduce transient overshoot provided at the output during transition of the attenuator component from one attenuation level to another.
地址 Hamilton BM