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    • 3. 发明授权
    • Mixed signal phase locked loop with process and temperature calibration
    • 混合信号锁相环,具有过程和温度校准
    • US5892406A
    • 1999-04-06
    • US735851
    • 1996-10-23
    • Curtis J. DickeJack Wolosewicz
    • Curtis J. DickeJack Wolosewicz
    • H03L7/099H03L7/10
    • H03L7/10H03L7/0807H03L7/0995Y10S331/02
    • A mixed signal phase locked loop is optimized for fast settling and low noise sensitivity. To this end, this device has a digital wide range delay line and a low gain per stage adjust. When first activated, the loop calibrates the digital delay line to its nominal delay characteristic. This delay line, together with the linear low gain per stage adjust, constitutes the internal oscillator of the phase locked loop. After achieving nominal delay, the oscillator uses the low gain per stage adjust to lock to a desired reference or a submultiple thereof. According to the preferred embodiment, the loop locks its internal 125 MHz oscillator to a 25 MHz reference. After achieving lock, the loop performs synchronous data recovery by locking to an incoming data stream, instead of the internal reference, and performing bit framing. In case of losing lock, the phase locked loop of the present invention is capable of recalibrating itself and regaining lock in under 3 microseconds.
    • 混合信号锁相环优化用于快速建立和低噪声灵敏度。 为此,该器件具有数字宽范围延迟线和每级低增益调整。 当第一次激活时,回路将数字延迟线校准为其额定延迟特性。 该延迟线与每级调节的线性低增益一起构成锁相环的内部振荡器。 在实现标称延迟之后,振荡器使用每级调节的低增益来锁定到期望的参考或其一个或多个。 根据优选实施例,环路将其内部125MHz振荡器锁定到25MHz参考。 锁定完成后,循环通过锁定到输入数据流而不是内部参考,并执行位框架来执行同步数据恢复。 在失锁的情况下,本发明的锁相环能够在3微秒内自行重新校准并重新锁定。
    • 4. 发明授权
    • Apparatus and method for encoding and decoding information in audio
signals
    • 用于对音频信号中的信息进行编码和解码的装置和方法
    • US6005501A
    • 1999-12-21
    • US083940
    • 1998-05-26
    • Jack Wolosewicz
    • Jack Wolosewicz
    • H04H20/31H03M7/00
    • H04H20/31
    • A method and apparatus encodes and decodes machine readable signals in audio signals for producing humanly perceived audio transmissions. The encoding device includes circuitry for identifying portions of the audio signal having relatively low energy in a given band and relatively high energy in a band proximally below the given band. The machine readable signals are then inserted into the identified portions of the audio signal. According to another embodiment, the machine readable signals are encoded as a spread-spectrum signal which is added to the original audio signal. The spread-spectrum signal is scaled using a unique technique referred to as Common Mode Scaling.
    • 一种方法和装置对音频信号中的机器可读信号进行编码和解码,以产生人为感知的音频传输。 编码设备包括用于识别在给定频带中具有相对较低能量的音频信号的部分的电路,以及在给定频带的近端范围内的频带中的相对较高的能量。 然后将机器可读信号插入音频信号的识别部分。 根据另一个实施例,机读信号被编码为加到原始音频信号的扩频信号。 使用称为共模缩放的独特技术对扩频信号进行缩放。