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				| 1. | How much phase shift does an Hilbert transformer impart on the input? | 
| A. | 45<sup>o</sup> | 
| B. | 90<sup>o</sup> | 
| C. | 135<sup>o</sup> | 
| D. | 180<sup>o</sup> | 
| Answer» C. 135<sup>o</sup> | |