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Frequency synthesizer

A frequency synthesis device and capacitor technology, applied in the direction of automatic power control, electrical components, etc., can solve the problems of insufficient bandwidth and low utilization efficiency of frequency sources, and achieve the effects of increased bandwidth, low power consumption, and small size

Inactive Publication Date: 2017-05-31
成都意科科技有限责任公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the bandwidth in the prior art is not wide enough, resulting in low frequency source utilization efficiency. The purpose is to provide a frequency synthesis device that utilizes the advantages of the chip ADF4351 to increase the bandwidth of the frequency synthesizer and improve The efficiency of the frequency source makes the frequency source work more stably

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  • Frequency synthesizer

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Embodiment

[0013] Such as figure 1 As shown, a frequency synthesis device includes a chip ADF4351, a resistor R19, a resistor R23, a resistor R24, a capacitor C31, a capacitor C33, a capacitor C38, and a light-emitting diode LED. One end of the resistor R19 is connected to the anode of the light-emitting diode LED. One end is connected with the lock detection output pin LD of the chip ADF4351, the cathode of the light-emitting diode LED is grounded, the signal of the chip ADF4351 is output through the lock detection output pin LD through the resistor R19; the charge pump output pin CPout of the chip ADF4351, Resistor R23 and capacitor C38 are connected in sequence, and the other end of capacitor C38 connected to resistor R23 is grounded; the charge pump output pin CPout of the chip ADF4351, capacitor C31, and resistor R24 ​​are connected in sequence, and resistor R24 ​​is connected to capacitor C31 The other end of the connection is grounded, one end of the capacitor C33 is connected to ...

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Abstract

The invention discloses a frequency synthesizer, which comprises a chip ADF4351, a resistor R19, a resistor R23, a resistor R24, a capacitor C31, a capacitor C33, a capacitor C38 and a light emitting diode LED, and is characterized in that one end of the resistor R19 is connected with an anode of the light emitting diode LED, the other end of the resistor R19 is connected with a lock detection output pin LD of the chip ADF4351, a cathode of the light emitting diode LED is grounded, and signals of the chip ADF4351 are outputted through the resistor R19 via the lock detection output pin LD. The bandwidth of the frequency synthesizer is enabled to be increased by utilizing advantages of the chip ADF4351, the efficiency of a frequency source is improved, and the frequency source is enabled to operate more stably; and meanwhile, the frequency synthesizer designed by utilizing the chip ADF4351 further has the advantages of small size and low power consumption.

Description

technical field [0001] The invention relates to the field of frequency synthesis, in particular to a frequency synthesis device. Background technique [0002] Based on the phase-locked loop frequency synthesis technology, since the phase-locked loop is equivalent to a narrow-band tracking filter, it can well select the signal of the required frequency, suppress spurious components, and avoid a large number of filters, while the standard frequency source has high Long-term frequency stability, the phase-locked frequency synthesizer combines the two, so that the long-term and short-term stability of the synthesized signal are very high. However, there are still problems in traditional frequency synthesis, for example, the bandwidth is not wide enough, resulting in low utilization efficiency of the frequency source, which greatly reduces the efficiency of the frequency source. Contents of the invention [0003] The technical problem to be solved by the present invention is t...

Claims

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Application Information

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IPC IPC(8): H03L7/18
CPCH03L7/18
Inventor 肖威
Owner 成都意科科技有限责任公司
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