发明名称 |
Two-frequency alternate tone generator |
摘要 |
A two-frequency alternate tone generator wherein a tone is generated by a single frequency oscillator whose frequency is changed by adding a capacitor across its tuned circuit by a transistor switch. The transistor switch is turned ON and OFF by an operational amplifier square wave generator, at an established rate. |
申请公布号 |
US3875526(A) |
申请公布日期 |
1975.04.01 |
申请号 |
US19730385133 |
申请日期 |
1973.08.02 |
申请人 |
GTE AUTOMATIC ELECTRIC LABORATORIES INCORPORATED |
发明人 |
BEEMAN, ROBERT H.;DIMMER, ROBERT P. |
分类号 |
H03B5/12;(IPC1-7):H03B5/12 |
主分类号 |
H03B5/12 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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