公开(公告)号：US4485356A

公开(公告)日：1984-11-27

申请号：US385067

申请日：1982-06-04

Applicant: Lorenzo Fassino

Inventor： Lorenzo Fassino

IPC: H03B1/00 ,  H03B5/20 ,  H03H11/48 ,  H03B5/26

CPC classification number: H03B5/20 ,  H03H11/485 ,  H03B2200/0034 ,  H03B2200/0066 ,  H03B2201/01

Abstract: A low frequency sinusoidal oscillator, comprises a circuit which contains operational amplifiers, resistors and capacitors and has no inductor. The circuit, however, operates as an inductor. The circuit is arranged to resonate at a frequency which may be chosen by acting on only one component which preferably is a resistive component.

Abstract translation: 低频正弦振荡器包括一个包含运算放大器，电阻和电容器并且没有电感的电路。 然而，该电路用作电感器。 电路被布置成以可以通过仅作用于优选为电阻部件的一个部件来选择的频率进行谐振。

公开(公告)号：US3916341A

公开(公告)日：1975-10-28

申请号：US39275373

申请日：1973-08-29

Applicant: PHILIPS CORP

Inventor： COOL HANS

IPC: H04M1/76 ,  H03B1/00 ,  H03B5/24 ,  H03B5/26 ,  H04L27/26 ,  H04M1/50 ,  H04Q1/45 ,  H04Q7/14 ,  H03B3/04

CPC classification number: H03B5/24 ,  H03B2201/01 ,  H04M1/50

Abstract: An arrangement for generating signals for selection, in particular for use in telephone subscribers sets. The device comprises a switchable RC- oscillator which is composed of an amplifier with negative feedback and a frequency-dependent voltage divider for positive feedback which comprises resistors, capacitors and switches. The frequency-dependent voltage divider has a configuration such that, if one switch is closed, the attenuation is smaller than the amplification of the amplifier and, if two switches are closed, the attenuation is larger than the amplification.

Abstract translation: 用于产生用于选择的信号的装置，特别是用于电话用户组中。 该器件包括一个可切换的RC振荡器，由一个负反馈的放大器和一个正向反馈的频率分压器组成，包括电阻，电容和开关。 频率相关的分压器具有如下结构：如果一个开关闭合，则衰减小于放大器的放大，并且如果两个开关闭合，则衰减大于放大。

公开(公告)号：US3903484A

公开(公告)日：1975-09-02

申请号：US48230874

申请日：1974-06-24

Applicant: US NAVY

Inventor： TESTANI ALAN J

IPC: H03B1/00 ,  H03B5/20 ,  H03B27/00 ,  H03L5/00 ,  H03B3/02

CPC classification number: H03L5/00 ,  H03B5/20 ,  H03B27/00 ,  H03B2200/0066 ,  H03B2200/0078 ,  H03B2200/0092 ,  H03B2201/01

Abstract: A quadrature oscillator is provided with a device which senses the output of the oscillator and compares it with a precision reference voltage to thereby obtain a signal which is used as the supply voltage provided to the integrating stages of the oscillator. By so controlling the supply voltage, the output of the oscillator is automatically amplitude stabilized and distortion is reduced.

Abstract translation: 正交振荡器设置有感测振荡器的输出并将其与精度参考电压进行比较的装置，从而获得用作提供给振荡器的积分级的电源电压的信号。 通过这样控制电源电压，振荡器的输出自动稳定，失真减小。