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    • 5. 发明授权
    • Electronic timer
    • 电子定时器
    • US4218871A
    • 1980-08-26
    • US922433
    • 1978-07-06
    • Nakanobu MoritaniHajime OdaToshihide Samejima
    • Nakanobu MoritaniHajime OdaToshihide Samejima
    • G04G15/00G04F1/00G04F3/00G04G13/00G07C1/28G04F8/00G04F10/00
    • G04G13/00G04F1/005G07C1/28
    • An electronic timer includes a presettable counter for continuously counting clock pulses and which is controlled to selectively count to a desired time count and to continuously count from that desired time count. A storage device stores, upon actuation, a time count counted by the presettable counter. A detection output is produced when the presettable counter has completed the counting from the desired time count therein to a given time count. An alarm is generated in response to the detection output and is thereafter stopped. In response to the stopping of the alarm, the presettable counter is preset with the time count stored in the storage device. In this way the presettable counter is automatically set to an initial time count to enable repeated use without complication.
    • 电子计时器包括一个用于连续计数时钟脉冲的预设计数器,并被控制以选择性地计数到期望的时间计数并从该期望的时间计数连续计数。 存储装置在启动时存储由预设计数器计数的时间计数。 当预设计数器从其中的期望时间计数完成计数到给定的时间计数时,产生检测输出。 响应于检测输出产生报警,此后停止。 响应于停止报警,预设计数器与存储设备中存储的时间计数一起预设。 以这种方式,可预设的计数器被自动设置为初始时间计数,以便能够重复使用而不会发生并发症。
    • 9. 发明授权
    • Overtone crystal oscillator
    • Overtone晶体振荡器
    • US4709218A
    • 1987-11-24
    • US885930
    • 1986-07-15
    • Nakanobu MoritaniMitsuyuki SugitaIsamu HoshinoHirofumi YanagiHitoshi IkenoTetsuro Konno
    • Nakanobu MoritaniMitsuyuki SugitaIsamu HoshinoHirofumi YanagiHitoshi IkenoTetsuro Konno
    • H03B5/32H03B5/36
    • H03B5/32
    • An overtone crystal oscillator includes a crystal vibrator, a CMOS circuit connected in parallel to the crystal vibrator, and two load capacitors connected to the input and output of the CMOS circuit, respectively. The capacitors have respective capacitances C.sub.g and C.sub.d determined to satisfy at least one of following two conditions wherein the first condition is that an oscillation starting resistance R.sub.KN of a desired N-th overtone is sufficiently larger than an effective resistance R.sub.QN of the crystal vibrator of the N-th overtone, the oscillation starting resistance being expressed as:R.sub.KN =K/(.omega..sup.2 .multidot.C.sub.g .multidot.C.sub.d)(.omega.: oscillating frequency, K: constant determined by mutual conductance of the CMOS circuit) and the second condition is that an effective resistance R.sub.Qn of the crystal vibrator of another n-th overtone except the desired N-th overtone satisfies the following relationR.sub.Qn >N.sup.2 .multidot.R.sub.KN /n.sup.2.
    • 泛音晶体振荡器包括晶体振荡器,与晶体振荡器并联连接的CMOS电路,以及分别连接到CMOS电路的输入和输出的两个负载电容器。 电容器具有确定为满足以下两个条件中的至少一个的各自的电容Cg和Cd,其中第一条件是所需N次谐波的振荡起始电阻RKN充分大于所述第N个泛音的晶体振子的有效电阻RQN 第N个泛音,振荡起始电阻表示为:RKN = K /(ω2×2Cg×Cd)(ω:振荡频率,K:由CMOS电路的互导确定的常数),第二条件是有效电阻RQn 除了所需的N次谐波之外的另一个第n个泛音的晶体振荡器满足以下关系RQn> N2xRKN / n2。