| 摘要 |
An inductorless modulator-demodulator circuit is disclosed including a pair of symmetrical channels each containing a control device biased to Class AB operation. Components of a first input signal are applied to corresponding selected electrodes of the control devices, respectively, the biasing being such that each of the control devices has a constant specific percent of conduction time. Components of a second input signal are applied simultaneously to a pair of electrodes of each control device, respectively, and owing to the specific bias maintained on the control devices, in-phase and out-of-phase components of the output signals of the devices may be added in such a manner that undesired out-of-phase components are eliminated through mutual cancellation without filtering, and the in-phase components are added to produce an undistorted output signal. The control devices of the channels of the balanced circuit may be either of the same or opposite polarity, respectively.
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