Programmable ECL (emitter coupled logic) device based high-frequency phase shift signal generation circuit

Abstract

The invention discloses a programmable ECL (emitter coupled logic) device based a high-frequency phase shift signal generation circuit. The existing high-frequency signal generator is expensive and the hardware circuit is complex. The programmable ECL device based a high-frequency phase shift signal generation circuit provided by the invention comprises a rapid comparator, a PLL (phase locking loop) frequency multiplier, an ECL signal clock distributor, a pulse suppressor, a first digital frequency divider and a second digital frequency divider; the rapid comparator converts an external clock signal into a square wave signal; the PLL frequency multiplier performs frequency multiplying on the square wave signal; the ECL signal clock distributor distributes the frequency multiplying signal to two ways, one way of the frequency multiplying signal is directly subjected to frequency division through the first digital frequency divider, and the other way of frequency multiplying signal is subjected to frequency division by the second digital frequency divider after the pulse suppressor suppresses a phase shift of 2pi; the frequency dividing multiple of the first digital frequency divider and the second digital frequency divider is respectively 2

, and the output signal of the first digital frequency divider has the phase shift as shown in the specification relative to the output signal of the second digital frequency divider. According to the invention, the circuit design principle is simple, and the duplicability is high.

Description

technical field [0001] The invention relates to a high-frequency phase-shift signal generating circuit, in particular to a high-frequency phase-shift signal generating circuit based on a programmable ECL logic device. Background technique [0002] With the development of electronic technology, high-frequency phase-shift signals are more and more widely used in precision engineering, electronics, biomedicine, and communication science research. The existing ordinary high-frequency signal generators often show unstable signals or high precision Not high, but high-performance high-frequency signal generators are expensive, which is not the best choice for general users. [0003] The traditional phase-shift signal generation circuit uses a phase-locked loop and a counter to form an address generator to implement data in different data memories. The phase shift of the signal is realized by changing the storage location of the data. This method has flexible output, but due to the ...

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Problems solved by technology

[0002] With the development of electronic technology, high-frequency phase-shift signals are more and more widely used in precision engineering, electronics, biomedicine, and communication science research. The existing ordinary high-frequency signal generators often show unstable signals or high precision Not high, but high-performance high-frequency signal generators are expensive, not the best choice for general users

[0003] The traditional phase-shift signal generation circuit uses a phase-locked loop and a counter to form an address generator to implement data in different data memories. The phase shift of the signal is realized by changing the storage location of the data. This method has flexible output, but due to the output frequency of the phase-locked loop It is suitable for low-frequency signal applications below 1MHz, and the counter, an important part of the phase-locked loop, is easy to lose control and the relatively complex circuit structure makes it difficult to guarantee the reliability of the entire circuit.

The high-frequency signal generator based on direct digital frequency synthesis (DDS) technology developed in recent years can realize phase-shift signal output with a frequency above 40MHz, and the phase-shift resolution can reach 0.01°. stability index

In addition, this kind of high-frequency signal generator is monopolized by foreign products, which is expensive, and the hardware circuit is complex, large in size, and not easy to carry

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