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    Electronic musical instrument master oscillator with provision for frequency control
    1.
    发明授权
    Electronic musical instrument master oscillator with provision for frequency control 失效
    电子音乐仪器主振荡器，用于频率控制

    公开(公告)号：US3701040A

    公开(公告)日：1972-10-24

    申请号：US3701040D

    申请日：1971-01-11

    Applicant: HAMMOND CORP

    Inventor： BORREVIK ALEXANDER J ,  TENNES CHARLES J

    IPC: G10H1/043 ,  H03B1/00 ,  H03B5/12 ,  G10H5/06 ,  H03B3/04 ,  H03B23/00

    CPC classification number: G10H1/043 ,  H03B5/1203 ,  H03B5/1231 ,  H03B5/1243 ,  H03B5/1256 ,  H03B2200/0034 ,  H03B2200/004 ,  H03B2200/0092 ,  H03B2201/0208 ,  Y10S84/11

    Abstract: A master oscillator operating in the MHz range for supplying a signal suitable for providing the notes of the musical scale, the various note signals being arrived at by frequency division of the master frequency. The oscillator has a high order of frequency stability together with ease of control for shifting the frequency to supply vibrato, portamento, trill, transposition features and the like. Control is exercised by incorporating a voltage-variable capacitance diode, ''''Varicap,'''' as an effective element in the oscillator tank and varying the diode bias. Features provide for isolation of the bias voltage from the main tank circuit, a zero-bias condition at the true frequency, and a novel comparison tuning system using a slightly off-pitch tuning reference standard for obtaining true pitch.

    Abstract translation: 在MHz范围内工作的主振荡器，用于提供适于提供音阶的音符的信号，各种音符信号通过主频率的分频得到。 振荡器具有高频率稳定性，并且易于控制以将频率转换为提供颤音，音轨，颤音，转置特征等。 通过将可变电容二极管“Varicap”作为振荡器槽中的有效元件并改变二极管偏压来实现控制。 特征提供了隔离主谐振电路的偏置电压，在真实频率下的零偏置条件，以及一种新颖的比较调谐系统，使用稍微偏移调谐参考标准来获得真正的音高。

    Dc keyed synthesis organ employing an integrated circuit
    2.
    发明授权
    Dc keyed synthesis organ employing an integrated circuit 失效
    DC关键合成器件采用集成电路

    公开(公告)号：US3636231A

    公开(公告)日：1972-01-18

    申请号：US3636231D

    申请日：1971-04-19

    Applicant: HAMMOND CORP

    Inventor： SCHRECONGOST RAY B ,  MILLET DAVID

    IPC: G10H1/08 ,  G10H1/06

    CPC classification number: G10H1/08 ,  Y10S84/08

    Abstract: A synthesis-type organ with direct current keying, envelope shaping and individual harmonic scaling particularly adapted to be compatible with frequency divider and MOSFET integrated circuit techniques. A DC voltage is scaled to several appropriate selected levels for the fundamental and individual harmonics and chopped by tone signals for the fundamental and selected harmonics to provide a collection of appropriately scaled square wave signals at the chopping frequencies. These square waves are individually keyed with appropriate envelope control through band pass sine filters adapted to reject all but the fundamentals of the keyed signals. The filtered outputs are mixed to supply output musical signals of appropriate harmonic quality having a desirable attack and decay envelope.

    Abstract translation: 具有直流键控，包络整形和单独谐波缩放的合成型器件，特别适用于与分频器和MOSFET集成电路技术兼容。 直流电压被缩放到用于基波和单个谐波的几个适当的选择电平，并且由基频和选定谐波的音调信号切断，以提供在斩波频率下适当缩放的方波信号的集合。 这些方波通过适合于拒绝所有键控信号的基本原理的通带正弦滤波器通过适当的包络控制进行单独键控。 经滤波的输出被混合以提供具有所需攻击和衰减包络的适当谐波质量的输出音乐信号。

    Arpeggio keyboard
    10.
    发明授权
    Arpeggio keyboard 失效
    琶音键盘

    公开(公告)号：US3911780A

    公开(公告)日：1975-10-14

    申请号：US46166274

    申请日：1974-04-17

    Applicant: HAMMOND CORP

    Inventor： DYLE CHARLES A ,  EDWARDS JOHN W

    IPC: G10H1/34 ,  G10C3/12

    CPC classification number: G10H1/34 ,  Y10S84/07

    Abstract: An arpeggio keyboard assembly for an electronic organ characterized by extreme simplicity and a major reduction of parts.

    Abstract translation: 一种用于电子琴的琶音键盘组件，其特征在于极简单和大幅度减少部件。

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