SU898449A1 - Logarithmic converter of single signal amplitude - Google Patents

Description

(54) LOGARIFMIC CONVERTER AMPLITUDE OF SINGLE AND: 11ULSES

I

The invention relates to transducers of pulsed logarithmic signals according to a logarithmic law and can be used in analog computers.

A functional voltage converter is known, which contains voltage dividers, a source of reference voltage, threshold blocks, the encoder 1.

However, the device is characterized by narrow functionality.

Closest to the present invention is a single-pulse logarithmic amplitude converter containing a threshold unit, voltage dividers, delay unit, reference voltage source, encoder, memory register 2.

A disadvantage of this device is its low speed.

The purpose of the invention is to increase the speed.

The delivered circuit is achieved in that the known logarithmically transducer of the amplitude of single pulses, containing serially connected voltage dividers, a threshold block, a delay unit, a source of reference voltage, an encoder connected in series, and a memory register, the input of the first of voltage dividers the input of the logarithmic amplitude converter of single pulses, to the output of the voltage divider is connected the input of the delay unit, the output of which is connected to the input of the first of the And divisors of the EIW output reference voltage source connected to the first input of the threshold unit, whose output is connected to the input nifratora, administered p-1 additional thresholds blocks, the first inputs of which are connected to the output of the reference voltage source, a second input of the threshold unit connected to the output

the first of the voltage divider, the second input of the codogs of Y} - additional threshold blocks are connected to the output of the corresponding voltage dividers, except for the first output h-1 of the additional threshold blocks connected to the corresponding inputs of the encoder.

The drawing shows a functional diagram of a logarithmic amplitude converter of single pulses.

The device contains voltage dividers 1-1, 1-2, 1-3, ... 1-U), delay unit 2, source 3 of the reference voltage, threshold unit 4, additional threshold units 5-1., .. 5 - (p-1), encoder 6, memory register 7, input 8 of a logarithmic amplitude converter of single pulses. The logarithmic transducer amplitude of a single pulse operates as follows.

Input 8 receives a single pulse. At the outputs of the voltage dividers 1-1, 1-2, 1-3, ... 1-L fop Q pz ots pulses, amneshtdude which is proportional, respectively, at the output of the first of their transmission coefficient, at the output of the second - the product of the transmission coefficient of the first and second voltage dividers 1-1 and 1-2, etc. At the output of the last voltage divider 1-h, this amplitude is proportional to the product of the transmission coefficients preceding the voltage divider (if these coefficients are equal, it is proportional to the nth power of the transmission coefficient). If the amplitude of the output voltage of the voltage dividers 1-1, .., 1-I is exceeded, the voltage values of the source 3 of the reference voltage, the threshold blocks 4, 5-1, ... 5- (p-1) generate signals. From the output of the last divider, the 1-P signal is fed to the input of the delay block 2. The delay time must be chosen longer than the pulse to be converted, and the attenuation coefficient is minimal. From the output of the delay block 2, the signal goes to the input of the first voltage divider 1-1. The next conversion cycle begins. The encoder 6 converts a parallel unit code from the outputs of the threshold blocks, 4.5-1 ... 5- (p-1) into a positional binary code. The memory register 7 performs the short-term storage and execution of a bitwise logical addition operation of the stored result of the previous cycle with the input result of the subsequent cycle.

The result of the conversion is

Uv

nogr

hn u

where and is the voltage value of the source of the reference voltage 3J

and, the magnitude of the amplitude of the pulse at the input 8;

transmission coefficient of voltage delimiters I-1, -2, ... 1-m.

The proposed logarithmic transducer of the amplitude of single pulses is characterized by higher speed.

Claims (2)

Invention Formula Logarithmic amplitude transducer of single pulses, the content of the arrester is connected to the U1 voltage divider, threshold block, delay unit, Reference voltage source, serially connected encoder and memory register, the input of the first h voltage divider is the input of the logarithmic amplitude converter single pulses, the output of the delay unit, the output of which is connected to the input of the first of the voltage dividers, the source output, is connected to the output of the I-th voltage divider. the reference voltage is connected to the first input of the threshold unit, the output of which is connected to the input of the encoder, characterized in that 5 that, in order to increase speed, hl of additional threshold blocks are entered in it, the first inputs of which are connected to the output of the voltage source, the second input of the threshold block is connected to the output of the first of voltage dividers, the second input of each of P-1 are additional the threshold blocks are connected to the output of the corresponding q voltage dividers, except for the first, the outputs of the additional threshold blocks are connected to the corresponding inputs of the encoder. Sources of information taken into account in the examination I. Gitis E, I Information converters for electronic digital computing devices. M., Energie, 1975, p. 3J4-316, fig. 7-10. 2. USSR author's certificate 694870, cl. G06 G 7/24, 1978 (prototype). IP1)