An injection-enhanced low-power injection-locked frequency tripler with wide locking range

Abstract

The invention belongs to the field of a radio frequency integrated circuit, and specifically relates to an injection enhanced low-power wide-locking-scope injection locking tripler. The circuit of the tripler is composed of a harmonic wave generator, a bypass current source and an injection locking oscillator. The harmonic wave generator is composed of a pair of NMOS tubes, by use of the nonlinearity characteristic of MOS tubes, fundamental frequency signals with omega as its input frequency are input, triple harmonic wave signals 3 omega are generated and are injected to the oscillator; the bypass current source is composed of a pair of PMOS tubes, the grid end of the bypass current source is biased on proper DC voltages, and proper current dividing is performed on the oscillator by taking the bypass current source as a DC source, such that the harmonic wave injection efficiency is improved; and the injection locking oscillator is composed of a pair of intersected coupling transistors, an inductor, capacitors and a digital control capacitor array, and the center frequency of the injection locking oscillator is near the 3 omega. The tripler provided by the invention improves the harmonic wave injection efficiency, and under the condition that power consumption is basically not increased, compared to a conventional injection locking tripler, greatly expands the locking scope.

Description

technical field

[0001] The invention belongs to the technical field of integrated circuits, and in particular relates to an injection-enhanced low-power-consumption and wide-locking-range injection-locked frequency tripler (Injection Locked Frequency Tripler, ILFT) applied to a radio frequency synthesizer. Background technique

[0002] In millimeter-wave communication, there are two ways to generate local oscillator signals: the first method uses a phase-locked loop directly operating at the required frequency to provide local oscillator signals; the second method uses a low-frequency phase-locked loop followed by a multiplier Frequency converter to provide local oscillator signal. The most important part of the phase-locked loop is the design of the voltage-controlled oscillator (VCO). If the first method of generating local oscillator signals is adopted, it is difficult to design a A high-performance voltage-controlled oscillator (VCO) that meets the requirements of the c...

Examples

Embodiment Construction

[0024] Take the design of an injection-locked frequency tripler with low power consumption and a wide locking range from 21GHz to 26.1GHz as an example.

[0025] Design the circuit diagram as figure 2 As shown, the TSMC 65nm RF CMOS 1P9M process is used, the simulation tool is CadenceSpectreRF, and the power supply voltage is 1.2V. The DC bias of the harmonic generator is about 0.35V, and the DC bias of the bypass current source is about 0.7V.

[0026] The MOS tubes are all radio frequency MOS tubes, the resistors are high-resistance polysilicon resistors, the capacitors are MIM capacitors, the inductors are on-chip spiral inductors with center taps, and the ninth layer of metal wiring.

[0027] The input signal size is 1.9dBm (single-ended peak-to-peak value is 0.7mV) differential signal, the locking range is 21GHz-26.1GHz, and the maximum DC power consumption is 5.28mA.

[0028] image 3 It is the output spectrum diagram obtained by simulation, wherein (a) the spectrum di...

technical field

[0001] The invention belongs to the technical field of integrated circuits, and in particular relates to an injection-enhanced low-power-consumption and wide-locking-range injection-locked frequency tripler (Injection Locked Frequency Tripler, ILFT) applied to a radio frequency synthesizer. Background technique

[0002] In millimeter-wave communication, there are two ways to generate local oscillator signals: the first method uses a phase-locked loop directly operating at the required frequency to provide local oscillator signals; the second method uses a low-frequency phase-locked loop followed by a multiplier Frequency converter to provide local oscillator signal. The most important part of the phase-locked loop is the design of the voltage-controlled oscillator (VCO). If the first method of generating local oscillator signals is adopted, it is difficult to design a A high-performance voltage-controlled oscillator (VCO) that meets the requirements of the c...

Examples

Embodiment Construction

[0024] Take the design of an injection-locked frequency tripler with low power consumption and a wide locking range from 21GHz to 26.1GHz as an example.

[0025] Design the circuit diagram as figure 2 As shown, the TSMC 65nm RF CMOS 1P9M process is used, the simulation tool is CadenceSpectreRF, and the power supply voltage is 1.2V. The DC bias of the harmonic generator is about 0.35V, and the DC bias of the bypass current source is about 0.7V.

[0026] The MOS tubes are all radio frequency MOS tubes, the resistors are high-resistance polysilicon resistors, the capacitors are MIM capacitors, the inductors are on-chip spiral inductors with center taps, and the ninth layer of metal wiring.

[0027] The input signal size is 1.9dBm (single-ended peak-to-peak value is 0.7mV) differential signal, the locking range is 21GHz-26.1GHz, and the maximum DC power consumption is 5.28mA.

[0028] image 3 It is the output spectrum diagram obtained by simulation, wherein (a) the spectrum di...

Images