SU1411978A1 - D-a converter - Google Patents

Abstract

This invention relates to digital measurement and computing technology. The chain extends the functional capabilities by providing an additional function of transforming codes with an irrational base. The device contains an analog adder I, a first n-bit binary digital-to-analog converter 2 (D / A converter), a source 3 of the reference voltage, a first switch 4, a trigger 5, an analog switch 6, a scaling amplifier 7 with a gain 47 of the second n-bit binary D / A converter 8, second register 9, first and second pins 10, 11 of the input code, first and second buses 12.13 operating modes, output bus 14. Enhanced functionality is provided by the presence of two operating modes: a 2n-bit conversion code with an irrational basis and converting it ifT n- discharge binary code. 1 il. (Oh c

Description

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The invention relates to the field of digital measuring and computing technology and can be used to convert digital values to analog ones, as well as in the development of interpolators of generators, vectors and devices generating the Haar functions.

The purpose of the invention is to expand the functionality by providing an additional function of converting codes with an irrational basis.

The drawing shows the functional diagram of the device for digital-to-digital conversion.

The device contains an analog adder 1, the first n-bit binary digital-to-analog converter 2, the source 3 of the reference voltage, the first register 4, the trigger 5, the analog switch 6, the scaling amplifier 7 with gain 2, WTO. swarm n-bit binary digital to analog converter 8, second register 9, first bus 10 input yes, second bus 11 input code,, first and second tires 12 and 13 modes of operation, output bus 14,

The device operates in the conversion mode of the 2p-bit code with the base of the PT and in the mode of conversion of the binary code to an analog value. .

The device for digital-to-analog conversion in the 2p-bit code conversion mode with the base operates as follows. The even and odd bits of the input code combination of the code with the base, present in the steps 10 and 11 of the input code, are written to the first and second registers 4 and 9, respectively. After the trigger 5 is set to one, the control signal the first bus 12 mode of operation, the voltage Ug of the source 3 of the reference voltage through the analog switch 6 supplies the input of the scaling amplifier 7, due to the fact that the transmission coefficient of amplifier 7 is equal to -fT, then on the analog input of the second n-bit binary .digital analog conversion the gate 8 has a voltage THU U. At the same time, a voltage is directly applied to the analog input of the first n-bit binary converter 2

Uo source 3 reference voltage, in accordance with the current values of the code combinations of the first and second registers 4 and 9, the first and second n-bit binary digital-to-analog converters create on their

voltage Ug i-1

nri 1-1

ZT a.2-

f proportional to the input digital information. These analog values are summed up by the analogue c / mmator 1 and, thus, the output voltage of device 14, a resultant voltage appears, which is proportional to the input code with the irrational base 1G.

In the binary-to-analog conversion mode, the trigger 5 with the control signal of the second operating mode bus 13 is set to the idle state, the analog switch 6 is closed and the voltage supply is stopped at the input of the scaling amplifier 7 and, therefore, at the input of the second binary digital-analogue Thus, only the source 3 of the reference voltage, the first n-bit binary digital-to-analog converter 2, the first register 4 and the alternator 1, Process the conversion of binary digital information into analog is analogous to that previously discussed in code conversion mode with a base f,

Claims (1)

Formula of inventions A device for digital-to-analog conversion containing the first register, the input of which is the first bus of the input code, the output is connected to the digital input of the first n-bit binary digital-to-analog converter, the analog input of which is connected to the output of the reference voltage source of which that, with. In order to extend the functionality by providing an additional conversion function with an irrational base of THU, an analog switch, a scaling amplifier with a gain of 2, a second n-bit binary were introduced. 3 14119784 digital-to-analog converter, which is connected to analog analog adder, second register of the second n-bit binary trigger, setup input to a single digital analog converter, the state of which is the first digital input of which is connected to bus mode operation, the input setting the output of the second register, the output of the ground zero state is the second connected to the first analog input pshnoy mode of operation, the output of the sub-switch, the output of which is whose input to the analog control input, output bus, the second input is connected key, the information input of which Q chen to the output of the first n-bit connected to the output of the reference digital-to-analog voltage converter, the output is connected to the user, while the input of the second reg the input of the scaling amplifier is the second fire of the input gain / TT, code output.