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    • 1. 发明授权
    • Self-tuning and temperature compensated voltage controlled oscillator
    • 自调谐和温度补偿压控振荡器
    • US06023198A
    • 2000-02-08
    • US93238
    • 1998-06-08
    • John K. McKinneyLorenzo CrugerBranko Avanic
    • John K. McKinneyLorenzo CrugerBranko Avanic
    • H03L1/02H03L7/095H03L7/099H03L7/10H03L7/189H03L7/00
    • H03L7/099H03L1/02H03L7/10H03L7/189H03L2207/06H03L7/095
    • A self-tuning VCO (116) receives a control voltage input (Vcont) (114) and an adjustable programmable voltage (Vadj) (122) and provides optimized locked conditions even under variations in temperature. A radio temperature is measured and stored (204) while Vadj (122) is initialized and stepped and Vcont (114) attempts to lock the VCO on frequency. Once a locked condition is achieved, the Vcont (114) is monitored to determine if it falls within a predetermined voltage range. If a non-optimized condition is detected, then the Vadj (122) is automatically adjusted until the VCO (116) becomes locked with a Vcont which falls within the predetermined voltage range. When a locked condition is achieved, the radio temperature is monitored and compared (212) to the original stored temperature (204). If a temperature threshold limit is reached (216) then the VCO is re-checks itself for a locked condition and re-optimizes itself to accommodate for the variations in temperature.
    • 自调谐VCO(116)接收控制电压输入(Vcont)(114)和可调可编程电压(Vadj)(122),并且即使在温度变化下也提供优化的锁定条件。 测量和存储无线电温度(204),同时Vadj(122)被初始化并且步进,并且Vcont(114)试图将VCO锁定在频率上。 一旦实现了锁定状态,则监视Vcont(114)以确定它是否落在预定的电压范围内。 如果检测到非优化条件,则Vadj(122)被自动调整,直到VCO(116)用落在预定电压范围内的Vcont锁定为止。 当达到锁定状态时,监测无线电温度并将其与原始存储温度(204)进行比较(212)。 如果达到温度阈值限制(216),则VCO将自动重新检测锁定状态,并自动重新优化以适应温度变化。