Frequency-voltage conversion circuit for dry cleaning machine

Abstract

The invention discloses a frequency-voltage conversion circuit for a dry cleaning machine, which comprises power supply voltage, a control chip, five fixed resisters, an adjustable resistor, a thermistor and three capacitors. A pin 1 of the control chip is connected with the power supply voltage and connected with the fifth fixed resister and the second capacitor which are grounded in parallel connection, the fourth fixed resister, the adjustable resistor and the third capacitor are sequentially serially connected between a pin 2 and a pin 5 of the control chip, a pin 3 and a pin 4 of the control chip are grounded in parallel connection, a pin 6 of the control chip is in parallel connection with a pin 7 of the control chip prior to being connected onto an interface through the first capacitor, the first fixed resistor is bridged between the pin 6 and a pin 8 of the control chip, and the second fixed resister and the thermistor are parallelly connected between the pin 7 and the pin 8 of the control chip. The frequency-voltage conversion circuit for the dry cleaning machine is simple in structure, low in cost and stable in performance and has popularization and use value.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a frequency-voltage conversion circuit for a dry cleaning machine. [0002] Background technique [0003] The control chip of the frequency-voltage conversion circuit of the dry cleaning machine needs to meet the requirements of high linearity, stable performance, single power supply operation, strong pulse output compatibility, wide dynamic range, and a full-scale output frequency of 1HZ-100KHZ; but in the prior art, Most of the frequency-to-voltage conversion circuits based on this chip have a relatively complex structure, which increases the cost of the frequency-to-voltage conversion circuit of the dry cleaning machine on the one hand, and at the same time, the complexity of the structure also increases the instability of product quality. [0004] Contents of the invention [0005] In order to overcome the shortcomings of the prior art, the present invention provides a frequency-...

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Problems solved by technology

[0003] The control chip of the frequency voltage conversion circuit of the dry cleaning machine needs to meet high linearity, stable performance, single power supply operation, strong pulse output compatibility, wide dynamic range, full scale The output frequency is required to be 1HZ-100KHZ; however, in the prior art, most of the frequency-voltage conversion circuits based on this chip are relatively complex in structure, which increases the cost of the frequency-voltage conversion circuit of the dry-cleaning machine on the one hand, and at the same time the structural Complexity also increases the instability of product quality

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