Second harmonic enhanced broadband divide-by-three frequency divider
A second harmonic and enhanced technology, applied in the field of millimeter-wave front-end circuits, can solve the problems of relatively small input frequency range and insufficient frequency division bandwidth of frequency dividers, and achieve easy application, increase frequency range, and enhance two Effect of Subharmonic Intensity
Active Publication Date: 2020-11-03
SOUTH CHINA UNIV OF TECH
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Problems solved by technology
The frequency division bandwidth of existing frequency dividers is not large enough, and a varactor is required for frequency tuning. In the case of no tuning, the relative bandwidth of the input frequency range is too small
Method used
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[0037] The present invention will be described in further detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0038] like figure 1 The shown second harmonic enhanced broadband frequency divider by three includes a first inductor L1x, a second inductor L1y, a third inductor L2, a fourth inductor L3, a first capacitor C1x, a second capacitor C1y, a The third capacitor C2x, the fourth capacitor C2y, the fifth capacitor C3x, the sixth capacitor C3y, the seventh capacitor C4, the first transistor M1x, the second transistor M1y, the third transistor M2x, the fourth transistor M2y, the fifth transistor M3x, the Sixth transistor M3y, seventh transistor M4, eighth transistor M5x, ninth transistor M5y, first resistor R1y, second resistor R1x, third resistor R2, fourth resistor R3x, fifth resistor R3y, first bias voltage VB , the second bias voltage VB1, the third bias voltage VB2;
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The invention discloses a second harmonic enhanced broadband divide-by-three frequency divider. The circuit comprises a first inductor, a second inductor, a third inductor, a fourth inductor, a firstcapacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, a first transistor, a second transistor, a third transistor, a fourth transistor, a fifth transistor, a sixth transistor, a seventh transistor, an eighth transistor, a ninth transistor, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first bias voltage, a second bias voltage and a third bias voltage. According to the invention, the differential pair and the transformer are utilized to enhance the intensity of the second harmonic in the frequency trisection, and the frequency range of the frequency divider is increased. In addition, frequency tuning is not needed, and the phase-locked loop is used in a phase-locked loop circuit and is easier to apply.
Description
technical field [0001] The invention relates to the field of millimeter wave front-end circuits of electronic communication technology, in particular to a second harmonic enhanced broadband frequency divider by three. Background technique [0002] In recent years, the fifth-generation (5G) communication has been favored by the academic and industrial circles. The millimeter-wave transceiver is an indispensable part of the 5G communication system. One of the key circuits is the first phase-locked loop followed by the voltage-controlled oscillator. 1st Divider - Injection Locked Divider. The frequency divider belongs to the front-end module in the phase-locked loop system, the working frequency is consistent with the oscillator frequency, and can track the change of the oscillator frequency and divide it. The most important performance specification for an injection-locked divider is the input signal bandwidth. [0003] In the current existing schemes, [1] uses the second ha...
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IPC IPC(8): H03D7/16
CPCH03D7/16
Inventor 薛泉宛操
Owner SOUTH CHINA UNIV OF TECH