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An oscillator circuit for generating a high-frequency electromagnetic oscillation

A high-frequency electromagnetic and oscillator technology, used in power oscillators, electrical pulse generation, pulse generation, etc., can solve problems such as elimination of downstream phase-locked loops, and achieve the effect of improving robustness and reducing sensitivity to interference

Inactive Publication Date: 2006-01-18
卡莱汉系乐有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

If such an oscillator is used to generate a clock signal, the stated instability is induced in such a clock signal and cannot be completely eliminated by a downstream phase-locked loop (PLL)

Method used

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  • An oscillator circuit for generating a high-frequency electromagnetic oscillation
  • An oscillator circuit for generating a high-frequency electromagnetic oscillation
  • An oscillator circuit for generating a high-frequency electromagnetic oscillation

Examples

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Embodiment Construction

[0077] Corresponding elements are always marked here with the same reference numerals.

[0078] figure 1 The Pierce oscillator has the form of a fundamental oscillator with an oscillator crystal, in its schematic circuit diagram in the form of an AC equivalent network, the oscillator crystal is labeled with the reference number 1, and the oscillator crystal through its two terminals Each is connected to an input 2 and an output 3 of an inverting amplifier 4 . A load resistor 5 is connected in parallel with the oscillator crystal 1 . The input 2 and the output 3 of the amplifier 4 are connected to ground 8 via two capacitors 6 and 7, respectively.

[0079] Very generally speaking, an oscillatory system is characterized in that it has a feedback loop whose transfer function, when open-loop, satisfies the "oscillating conditions", i.e., the sum of the transfer functions is greater than or equal to 1 and its phase response is equal to 360° multiples of . Unwanted resonant freq...

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Abstract

An oscillator circuit for generating a high-frequency electromagnetic oscillation, comprises: an amplifier configuration with at least one input and at least one output,-an oscillator crystal connected to at least one of the outputs of the amplifier configuration, a bandpass filter configuration, which is connected, with at least one input, to the oscillator crystal and the at least one output of the amplifier configuration connected to the oscillator crystal, and back coupled, with at least one output, to the input, or at least one of the inputs, of the amplifier configuration. Through dimensioning of the amplitude-frequency characteristic and / or the phase-frequency characteristic of the band-pass filter configuration as a function of the amplitude-frequency characteristic and the phase-frequency characteristic of the amplifier configuration and the crystal oscillator, the oscillation condition is hereby fulfilled exclusively for a selected harmonic of the oscillator crystal, and the high-frequency, electromagnetic oscillation formed by this selected harmonic of the oscillator crystal is available at the output of the bandpass filter configuration. This oscillator circuit is simply constructed and enables operation that is at least largely non-susceptible to interference.

Description

technical field [0001] The invention relates to oscillator circuits for generating high frequency electromagnetic oscillations. Background technique [0002] From the monograph U. Tietze and Ch. Schenk, "Halbleiter-Schaltungtechnik" (Semiconductor Circuits), 8 th edition, Springer-Verlag, 1986, section 15.2.2, pp.450-451, is known from Pierce oscillators, which are designed as oscillators using the fundamental frequency of the oscillator crystal. In this fundamental frequency oscillator, the circuit is configured to oscillate at the fundamental frequency of the oscillator crystal. [0003] It is also known from the above-mentioned monograph "Halbleiter-Schaltungtechnik", section 15.2.3, pp. 452-454, that it is difficult to make oscillator crystals for frequencies above 30 MHz. As a solution for generating such high frequencies with crystal stability, it is proposed here to excite the oscillator crystal with harmonics, since the oscillator crystal also has resonance points ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/36H03K3/354
CPCH03B5/36H03B5/06
Inventor A·克尔曼
Owner 卡莱汉系乐有限公司
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