发明名称 |
ACTIVE GUARDING FOR REDUCTION OF RESISTIVE AND CAPACITIVE SIGNAL LOADING WITH ADJUSTABLE CONTROL OF COMPENSATION LEVEL |
摘要 |
In various embodiments, applicants' teachings are related to an active guarding circuit and method for reducing parasitic impedance signal loading on a signal-transmission channel that is shunted by a parasitic impedance. The presence of an electrical signal on the signal-transmission channel causes a leakage current to flow through the parasitic impedance. In various embodiments, the circuit comprises an amplifier and an impedance, one terminal of the impedance is coupled to the signal-transmission channel. The input of the amplifier is coupled to the signal-transmission channel and the output is coupled to the other terminal of the impedance so as to cause a compensation current to flow through the impedance. The gain of the amplifier and the value of the impedance are selected so that the compensation current has a magnitude substantially equal to the leakage current magnitude. |
申请公布号 |
CA2703361(C) |
申请公布日期 |
2016.06.28 |
申请号 |
CA20082703361 |
申请日期 |
2008.03.31 |
申请人 |
IMPEDIMED LIMITED |
发明人 |
ALTMEJD, MORRIE;ZHANG, FRANK;IRONSTONE, JOEL;SMITH, KENNETH CARLESS;FAN, CHUNG SHING;WANG, DAVID |
分类号 |
G05F5/00;H03F1/08;H03F1/10 |
主分类号 |
G05F5/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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