SU1182683A1 - Voltage-to-frequency converter - Google Patents

Abstract

VOLTAGE CONVERTER: A FREQUENCY CONTAINER that contains the time specified by an integrating R C-chain and a bipolar transistor whose emitter is connected to a common bus, and the collector is connected via a resistor to the power supply bus, characterized in that, in order to increase the conversion linearity, the first a field-effect transistor and a field-effect transistor with two gates, the drain-source transition of the first field-effect transistor is connected in series with the resistor of the time specifying the integrating JZ chain, and its gate is connected to the source bus and power, the drain of the FET having two gate connected to the base of the bipolar transistor, the first gate - the collector of a bipolar transistor, a second gate - to the input transducer, the source - to yield the time for giving an integrating RC-chain.

Description

The invention relates to a pulse technique, in particular to linear frequency converters controlled by a voltage input signal.

The purpose of the invention is to increase the linearity of the transformation by providing a linear dependence of the voltage across the discharge element in the relaxation generator on the input voltage to be converted.

The drawing shows a schematic diagram of the proposed Converter.

The voltage-to-frequency converter contains a field-effect transistor 1 with two gates, a bipolar transistor 2, a time specifying an integrating RC circuit, performed for the time of the driving capacitor 3, the time of the driving resistor 4 and the current-stabilizing first field-effect transistor 5 connected in series between the common bus and the bus the source of the pit-ani, resistor 6, the transition and the drain-source of transistor 1 is connected between the transistor base-emitter transistor 2 and

the output is the time of the master circuit, with input 7 of the converter being the gate of the field-effect transistor 1.

The voltage to frequency converter operates as follows.

When power is applied to the power line and a given input voltage to the gate of transistor 1,

transistors 1 and 2 are closed. The charging current flows through the transistor 5 and the time of the jobs of the resistor 4. The voltage across the capacitor 3 rises linearly, reaches a voltage equal to

a given input voltage across the gate of transistor 1. Transistor 1 opens. A further increase in the voltage across the capacitor 3 leads to unlocking of the discharge element. The voltage on the capacitor 3 drops to the level of the specified input voltage. Transistor 1 is locked, current is interrupted through transistors 1 and 2, they are closed. Capacitor voltage

3 again begins to increase, and the generation cycle repeats.

Claims (1)

VOLTAGE TRANSFORMER? ! In FREQUENCY, containing a time-integrating RC circuit and a bipolar transistor, the emitter of which is connected to a common bus, and the collector is connected through a resistor to the power supply bus, characterized in that, in order to increase the linearity of the conversion, the first field-effect transistor and field-effect transistor with two gates, and the drain-source transition of the first field-effect transistor is connected in series with a time-integrating RC-resistor, and its gate is connected to the power supply bus, the drain of the field-effect transistor with two gates connected to the base of the bipolar transistor, the first gate - the collector of the bipolar transistor, a second gate - a converter input source - in a yield of timing of the integrating RC-chain.