发明名称 |
Apparatus for shifting the phase of transmitter and receiver analog baseband signals in an NMR system |
摘要 |
Apparatus for shifting the phase of a phase-quadrature signal pair, in at least one of the transmitter and receiver of an NMR system, uses a circuit for shifting the phase of each of the pair of signals by a substantially similar amount responsive to a control signal, and a microcontroller for programmably establishing the control signal data to provide a desired phase shift. Typically, the control signal is of digital data nature and the phase shifter operates to shift signal phase through an angle equal to a selected multiple N of a basic angle. The basic angle is selected such that a plurality of equal angle increments are established by the resolving properties of the data signal. A plurality of phase shifters can be controlled by a single microcontroller.
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申请公布号 |
US4736328(A) |
申请公布日期 |
1988.04.05 |
申请号 |
US19850779338 |
申请日期 |
1985.09.23 |
申请人 |
GENERAL ELECTRIC COMPANY |
发明人 |
VATIS, DIMITRIOS;DUMOULIN, CHARLES L. |
分类号 |
G01R33/36;(IPC1-7):G01R23/00;G01V3/00;G05F5/00 |
主分类号 |
G01R33/36 |
代理机构 |
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代理人 |
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地址 |
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