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基本信息:
- 专利标题: CHOPPER-STABILIZED INSTRUMENTATION AMPLIFIER FOR IMPEDANCE MEASUREMENT
- 专利标题(中):用于阻抗测量的CHOPPER-STABILIZED INSTRUMENTATION AMPLIFIER
- 申请号:US12058066 申请日:2008-03-28
- 公开(公告)号:US20080183098A1 公开(公告)日:2008-07-31
- 发明人: Timothy J. Denison , Wesley A. Santa
- 申请人: Timothy J. Denison , Wesley A. Santa
- 申请人地址: US MN Minneapolis
- 专利权人: Medtronic, Inc.
- 当前专利权人: Medtronic, Inc.
- 当前专利权人地址: US MN Minneapolis
- 主分类号: A61B5/053
- IPC分类号: A61B5/053 ; H03F3/38 ; A61N1/00
摘要:
This disclosure describes a chopper stabilized instrumentation amplifier. The amplifier is configured to achieve stable measurements at low frequency with very low power consumption. The instrumentation amplifier uses a differential architecture and a mixer amplifier to substantially eliminate noise and offset from an output signal produced by the amplifier. Dynamic limitations, i.e., glitching, that result from chopper stabilization at low power are substantially eliminated through a combination of chopping at low impedance nodes within the mixer amplifier and feedback. The signal path of the amplifier operates as a continuous time system, providing minimal aliasing of noise or external signals entering the signal pathway at the chop frequency or its harmonics. The amplifier can be used in a low power system, such as an implantable medical device, to provide a stable, low-noise output signal.
摘要(中):
本公开描述了一种斩波稳定仪表放大器。 放大器被配置为以低功耗实现稳定的低频测量。 仪表放大器使用差分架构和混频器放大器来基本上消除由放大器产生的输出信号的噪声和偏移。 通过在混频放大器和反馈中的低阻抗节点处的斩波的组合,基本上消除了在低功率下由斩波器稳定所产生的动态限制,即,短路。 放大器的信号路径作为连续时间系统工作,在斩波频率或其谐波处提供噪声或外部信号的最小混叠进入信号通路。 该放大器可用于诸如可植入医疗设备的低功率系统中,以提供稳定的低噪声输出信号。
公开/授权文献:
IPC结构图谱:
A | 人类生活必需 |
--A61 | 医学或兽医学;卫生学 |
----A61B | 诊断;外科;鉴定 |
------A61B5/00 | 用于诊断目的的测量;人的辨识 |
--------A61B5/04 | .测量人体或人体各部分的生物电信号 |
----------A61B5/053 | ..测量身体某个部位的电阻抗或导电率 |