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An oscillator circuit for generating a high-frequency electromagnetic oscillation

A high-frequency electromagnetic and oscillator technology, applied in power oscillators, electric pulse generation, pulse generation, etc., can solve the problems of high noise sensitivity, insufficient reduction of high-frequency noise, and oscillators that are not suitable for generating high frequencies.

Inactive Publication Date: 2009-05-06
卡莱汉系乐有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This oscillator has several disadvantages, in particular, it is too noise sensitive and does not sufficiently attenuate high frequency noise
In addition, it is susceptible to parasitic high-frequency oscillations
Due to these disadvantages, this oscillator is not suitable for generating very high frequency

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

Experimental program
Comparison scheme
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Embodiment Construction

[0078] Corresponding elements are always marked here with the same reference numerals.

[0079] 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.

[0080] 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 high frequency electromagnetic oscillations comprising: - an amplifier arrangement having at least one input and at least one output, - an oscillator crystal connected to at least one of the outputs of the amplifier arrangement, - a bandpass filter An oscillator configuration is connected via at least one input to an oscillator crystal and to at least one output of an amplifier configuration connected to the oscillator crystal, and is coupled via at least one output back to the input or at least one input of the amplifier configuration. where the amplitude-frequency and / or phase-frequency characteristics of the bandpass filter configuration are adjusted such that only the selected oscillator crystal The oscillation conditions for crystal harmonics are fulfilled and high frequency electromagnetic oscillations formed by the selected oscillator crystal harmonics are available at the output of the bandpass filter configuration. This oscillator circuit is structurally simple and its operation is at least substantially insusceptible 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 utilizing 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 po...

Claims

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Application Information

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Patent Type & Authority Patents(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