Oscillator and method for generating sine-wave output signal

A technology for outputting signals and oscillators, applied in the field of oscillators, can solve problems such as increased distortion and unrealistic, and achieve the effect of eliminating noise sources and low power consumption

Inactive Publication Date: 2005-08-10
INFINEON TECH AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The attack time can be shortened, but at the cost of increased distortion, which means that in practice it is not realistic

Method used

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  • Oscillator and method for generating sine-wave output signal
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  • Oscillator and method for generating sine-wave output signal

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Embodiment Construction

[0018] figure 1 Depicted is the voltage-time function when starting a conventional Wien oscillator. As can be seen from the figure, the typical time required from starting the oscillator until the output signal reaches and stabilizes at its set point value is at least 50 cycles. It is easy to understand that switching the oscillator is not practical because after the oscillator is switched on, the oscillator cannot be stabilized before it has to be switched off again.

[0019] Figure 2 is a graph of the voltage as a function of time when switching on the oscillator of the present invention. It can be seen from Fig. 2 that after starting the oscillator, the signal has been stabilized from 1 to 5 periods of the output signal. According to the definition of "stable", that is, according to which error or errors are allowable with respect to the set point value of the output signal, it can be seen that if the allowable error is larger, the signal will stabilize after about one cy...

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Abstract

The present invention relates to a device for generating a sinewave output signal and comprising an oscillator. The oscillator includes means for respectively connecting and disconnecting one of the device supply voltages, such that when connecting said supply voltage the sinewave output signal will be stabilised after a time period corresponding to an interval of 1-5 periods of the sinewave output signal. The invention also relates to a method of quick-starting a sinewave output signal.

Description

technical field [0001] The present invention relates to oscillators and methods for generating sinusoidal output signals. Background technique [0002] In order to generate an analog telephone ringing signal, a sine wave signal with a low frequency range of 16-60 Hz is required. In ring mode, the actual ring signal is generated approximately 20% to 50% of the time according to each specific specification. For example, a ring signal will sound for 1 second followed by 3 seconds of silence. In certain short-line applications where there are only one or two or more analog lines, such as ISDN, some manufacturers have implemented a calling subscriber line circuit called a Subscriber Line Interface Circuit (SLIC). This circuit sends a ring signal to the phone without using an external ring generator and ring relay. In this configuration, the SLIC acts as a pass-through amplifier to which a sinusoidal signal is applied. The ringing signal is generated by some form of oscillator...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03B5/26H03B5/24H03L3/00H04M1/00
CPCH03B5/24H03L3/00H03B5/06
Inventor A·桑纳
Owner INFINEON TECH AG
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