ALC circuit and radio frequency signal source

A technology of radio frequency signal and voltage signal, which is applied in the field of microwave radio frequency, can solve the problems of inability to solve the influence of temperature change on the amplitude, low efficiency, and long time, so as to save calibration time, improve production efficiency, and reduce the impact of temperature amplitude Effect

Pending Publication Date: 2018-11-13
RIGOL
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Problems solved by technology

However, during the implementation of this scheme, it is necessary to calibrate the influence of temperature changes on the ALC loop, which takes a long time and is ineffici

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  • ALC circuit and radio frequency signal source
  • ALC circuit and radio frequency signal source
  • ALC circuit and radio frequency signal source

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Embodiment Construction

[0053] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0054] The principle and spirit of the present invention will be explained in detail below with reference to several representative embodiments of the present invention.

[0055] The present invention aims at the temperature compensation of the digital ALC loop in the prior art because it is implemented in the logarithmic amplification module, so it cannot solve the influence of the temperature change on the amplitude in the ALC OFF state, and proposes an ALC c...

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Abstract

The invention provides an ALC circuit and a radio frequency signal source. The ALC circuit comprises an input port, a radio frequency link connected to the input port, a feedback loop connected to theradio frequency link and an output port, wherein the radio frequency link comprises a variable attenuator connected to the input port, a first radio frequency amplifier connected to the variable attenuator, a temperature compensation module connected to the first radio frequency amplifier, a second radio frequency amplifier connected to the temperature compensation module and a power divider connected to the second radio frequency amplifier; the feedback loop comprises a detector connected to the power divider, a digital acquisition module connected to the detector, a digital processing module connected to the digital acquisition module and a digital-to-analogue conversion module connected to the digital processing module. According to the ALC circuit and the radio frequency signal source, the influence of the temperature on the gain of the radio frequency link is reduced, so that the calibration time can be saved, and the production efficiency can be improved.

Description

technical field [0001] The present invention relates to the field of microwave radio frequency technology, in particular to a general instrument in the field of microwave radio frequency, specifically an ALC circuit and a radio frequency signal source. Background technique [0002] The RF signal source is a general instrument in the field of microwave RF, which can provide a specific RF signal with stable output. Widely used in scientific research, education, industry and other fields. The two main specifications of an RF signal source are frequency range and amplitude dynamics. The main indicators in terms of amplitude include amplitude accuracy, minimum amplitude step and dynamic range. The automatic level control ALC circuit is the main circuit to realize the amplitude control part. [0003] If the RF signal source is to output an RF signal with an accurate amplitude, an amplitude stabilizing device is required. The traditional method is to use the analog ALC loop, an...

Claims

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Application Information

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IPC IPC(8): H03H11/38H03H11/24H03G3/30
CPCH03G3/3042H03H11/24H03H11/38
Inventor 王丽明陈贝王悦王铁军李维森
Owner RIGOL
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