| 摘要 |
First and second signals, with given bias levels are applied to respective inputs (out 1, out 2) of a non-additive mixer (NAM) circuit (100) through respective switches (SW1,SW2) which can be in a low-cost CMOS switch (30) to provide a cost effective switch for television signals. Each input of the NAM circuit is biased at a reference level (through R1,R3) in the absence of applied signal to it. The input receiving signal plus bias is enabled thereby to convey its respective signal to the output (40) of the NAM circuit (100), and the input receiving the reference bias level is prevented from conveying its respective signal to the output (40) of the NAM circuit (100). |
