| 摘要 |
A radio receiver incorporates an AGC system having an upper wide band threshold and a narrow band threshold. Both thresholds are made temperature independent. The narrow band threshold is related to the circuit response to tuning meter voltage and the wide band threshold is related to the tuner output prior to i-f selectivity. When these responses are logically anded, an AGC response having the desirable characteristics of both narrow band and wide band systems is achieved. An IC form of AGC circuit is disclosed.
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