| 摘要 |
An improved double balanced diode mixer for high frequency operation is described. The mixer contains two series connected pairs of high frequency diodes operated in a modified bridge configuration. The diode series pairs are alternately switched on and off by a local source of high frequency oscillations. The high frequency signal being mixed is applied across the interconnections between the diodes in each series pair. An IF output signal resulting from the mixing process is derived at the output. Mutual isolation is provided between the diode series pairs in their coupling to the local source so that current flowing in one pair produces a minimum effect upon current flowing in the other pair. This provision generally lessens the adverse effects of the charge storage and other diode parasitics at high operating frequencies. The mixer is relatively free of spurious responses and undesired intermodulation products in the IF pass band and is suitable for use in a television receiver.
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