SU1322405A1 - Frequency divider with 2:1 countdown - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to expand the frequency band of the input signal. The divider contains a broadband amplitude modulator (CAM) 1, a high-frequency generator 2, an amplifier 3, a summator 4, a limiter 5, a band-pass filter 6, a multiplier 7, and a low-pass filter 8. The frequency band of the input signal is determined by the wide CAM 1 band, whose modulation factor is 1. The goal is achieved by introducing a limiter 5, which forms a pulse train, and a bandpass filter 6, which selects the desired harmonic component of the signal from the harmonics-rich periodic pulse train. 1 il. 00 to 4 ;: About SP

Description

The invention relates to radio engineering and can be used in the construction of frequency synthesizers, pathogens, receiver oscillators.

The purpose of the invention is to expand the input signal bandwidth.

The drawing shows a structural electrical frequency divider circuit by two.

The frequency divider into two contains a single-band amplitude modulator (OAM) 1, a high-frequency oscillator 2, an amplifier 3, an adder 4, a limiter 5, a band-pass filter 6, a multiplier 7 and a low-pass filter 8.

The frequency divider for two works as follows.

The input signal of the Bi-ada Ug and, “cos (2 / rf ()” and the generator signal 2 of the form and, cos (2) / f pt -1-4) are fed to two OAM inputs I The signal at the output of OAM 1 looks like

Om mU2Cosf2 (f f,

And "l

) t + j- + lf.

The signals from the output of the amplifier 3 and from the output of the generator 2 are fed to the corresponding inputs of the adder 4, the output of which the signal has the form

A frequency divider into two, containing a series-connected high-frequency generator, a single-band amplitude modulator and an amplifier, serially connected multiplier and a low-pass filter, as well as an adder, characterized in that, in order to expand the frequency band of the input signal, between the output of the adder and the first input multiplier introduced in series connected limiter and bandpass

z

and, +

and

Odm

A (t)) t + (f +. Iv (t), filter, with the first input of the combiner. Connected to the output of the generator, Ajj (t), the amplitude of the resulting frequency, the second input of the adder

signal connected to the output of the amplifier, the second

Limiter 5 limits the amplitude input of the multiplier connected to the signal output, thereby forming an adder-35 for the adder, while the modulus index is the pulse length, and the required signal of the sig- nal of the single-band amplitude modulus 6 is equal to 1.

Compiled by N, Chekanova Editor N. Lazarenko Tehred i.Popovich

 Order 2875 / 52Tyr-as much 901

VNIIPI USSR State Committee

for inventions and discoveries 113035, M: Oskva, Zh-35, Raushsk nab. D. 4/5

Production and printing company, Uzhgorod, y, n, Proektna, 4

nal - the required harmonic component of the signal - from a harmonic-rich periodic pulse train,

The slider 7 multiplies two harmonic signals, and the low-pass filter separates the difference frequency signal.

"ABOUT

and R cos

2 AC / t. .

2

The frequency band of the input signal is determined by the wide band OAM 1, whose modulation coefficient is 1.

Claims (1)

Invention Formula A frequency divider into two, containing a series-connected high-frequency generator, a single-band amplitude modulator and an amplifier, serially connected multiplier and a low-pass filter, as well as an adder, characterized in that, in order to expand the frequency band of the input signal, between the output of the adder and the first input multiplier introduced in series connected limiter and bandpass filter, while the first input of the summa-.ra is connected to the output of the generator vyskorrektor L. Patay. Subscription