SU1374432A1 - Optronic d-a converter - Google Patents

Abstract

The invention relates to automation and computing and is intended to convert binary codes into an analog signal. The purpose of the invention is to increase the speed and expansion of the field of application by providing the possibility of one time conversion of various input codes. An optoelectronic digital-to-analog converter contains a source of collimated light 1, a block 2 for dividing the light flow according to a binary-weighted law, performed on a group of optical unmanaged taps, two groups 3 and 4 of optical electrically controlled taps, two optical combiners 5 and 6 Three groups of 7-9 optical fibers. Introduction to the device of the second group 4 optical electrically-controlled taps, switches, the second optical adder 6, as well as the implementation of the unit 2 for dividing the luminous flux into uncontrolled optical taps ensured a positive effect. 1 il. GL i W with 4 4 SO 1 hd

Description

The invention relates to automation and computing and is intended to convert binary codes into an analog signal.

The purpose of the invention is to increase speed and expand the scope by enabling the simultaneous conversion of various input codes.

The drawing shows a functional diagram of the device.

The device contains a source of 1 collimated luminous flux, a unit of dividing the beam according to a binary-weighted law, two groups of 3 and 4 optical electrically controlled switch-actuators, two optical suction curtains 5 and 6 and three groups of 7-9 optical fibers, and the division unit The beam is made on a group of unmanaged optical couplers.

The device works as follows.

Light radiation from a light source (for example, a laser diode) is transmitted through an optical communication channel made on optical fibers 7 of the first group, and is transmitted to the inputs of unmanaged optical couplers 2, each of which redistributes the energy of light radiation between waveguides in accordance with specified coefficients I am welcoming them. Light beams from the first (second) outputs of the unmanaged optical couplers 2 distributed in energy in accordance with the binary-weighted law using fiber optic fibers of the second 8 (third 9) groups are fed to the optical electrically controlled otvetchiki switches of the first (second) group. At zero digital codes and, - and "(and, - and,) on the control inputs of optical electrically controlled switches 3 (4) there are no light fluxes on their outputs, as a result and nz output of optical adders 5 (6) to zero When a digital input code other than zero, the switching of those optical switches of group 3, the control inputs of which receive a signal, occurs. At the outputs of the corresponding optical switches 3, light fluxes appear with corresponding weights that cymrcc opt 1-1 adder 5

and arrive at the first output of the device.

Upon receipt of the control switches of the optical switches of the second group 4 of a transparent input code ,,,. I

and, - and, at the outputs of the optical switches of the second group 4, light fluxes are formed with an intensity corresponding to the weight of a certain bit of the input 1 code, and at the output of the second optical adder 6 a light flux is formed, the intensity of which is proportional to the input code.

By using an unmanaged optical coupler in dividing unit 2, as well as by introducing a second group of optical switches 4 and a second optical adder 6, various outgoing digital codes are converted.

Claims (1)

25 claims An optoelectronic digital-analog converter containing a source of a collimated light stream, a unit of dividing the luminous flux according to a binary-weighted law, the first group of optical electrical controlled taps, the control inputs of which are the first control input bus and the outputs are optically connected with the corresponding inputs1 1 and the first optical adder, the output of which is the first output bus, characterized in that, in order to increase speed and expand the region, By means of providing the possibility of simultaneous conversion of different input codes, a second group of η optical electrically controllable taps are introduced into it. LE5 is the first, second and third groups of η optical fibers, with the unit of dividing the luminous flux according to a binary-weighted law designed as a group of np p unmanaged optical couplers whose inputs are connected to the output of a source of a collimated luminous flux through the corresponding optical fibers of the first 1 group; the first and second outputs through the optical fibers of the second and third groups, respectively, are connected to 0 five 0 five 0 five 313744324 the corresponding information inputs of the second group are the second control lines of the optical electrically-controlled input bus, and the outputs of the opto-couplers-switches are respectively connected to the corresponding first and second groups, the control inputs of the second optical summing inputs of the optical electrical controllers, the output of which is the second fi ted coupler-switch output bus.