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An electronic circuit for frequency tripling

A circuit and frequency technology, applied in the field of electronic circuits with triple frequency, can solve the problems of high bandwidth limitation, high design complexity, poor suppression, etc.

Pending Publication Date: 2021-03-23
STMICROELECTRONICS SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Even though the LC resonant circuit 15 is dimensioned to maximize rejection while compromising bandwidth, the Class C tripler circuit 10 has poor rejection which cannot be increased above 20dB
[0015] In principle, Class C tripler circuits can be improved by using more complex filter topologies or by cascading multiple filter stages, but at the expense of high design complexity, large area, bandwidth limitations, and higher power consumption
[0016] Although injection-locked oscillator solutions (see, for example, N. Mazor et al., "A high suppression frequency tripler for 60-GHz transceivers", 2015 IEEE MTT-S International Microwave Symposium, 2015, pp. 1-4) also offer comparative good rejection (up to about 30dB), but it does not solve the problem satisfactorily

Method used

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  • An electronic circuit for frequency tripling
  • An electronic circuit for frequency tripling
  • An electronic circuit for frequency tripling

Examples

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Embodiment Construction

[0030] Figure 4 A tripler circuit 20 according to one embodiment of the invention is shown, which allows obtaining a high rejection of undesired harmonics.

[0031] The tripler circuit 20 represents an embodiment of an ideal transistor-based tripler circuit having a polynomial transformation characteristic f(V in ) (hereinafter also referred to as ideal polynomial transformation characteristics):

[0032]

[0033] where gm is the transconductance (under specified DC bias conditions) of the transistors in the tripler circuit.

[0034] In particular, as can be demonstrated with some calculations, at the input of the tripler circuit is received the following, with amplitude A and fundamental frequency f 0 In the case of a sinusoidal drive voltage of V in =A sin(2πf 0 t)=A sin(ω 0 t)

[0035] , the above ideal transformation characteristics allow the tripler circuit to generate only the third harmonic (3f 0 ) output current Io:

[0036] I o =f(V in ) = g m sin(3 ...

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Abstract

Embodiments of the present disclosure relate to an electronic circuit for frequency tripling. In one embodiment, a circuit for frequency tripling is configured to receive an input voltage (Vin) havinga sinusoidal shape and a fundamental frequency. The circuit has a first transistor pair and a second transistor pair that are cross-coupled, and has a transformation characteristic f (Vin) close to apolynomial nominal transformation characteristic given by the following formula: wherein A represents the amplitude of the input voltage, and gm is the transconductance of the transistors of the first transistor pair and the second transistor pair.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Italian Patent Application No. 102019000016871 filed on September 20, 2019, which is hereby incorporated by reference. technical field [0003] The present invention relates to an electronic circuit, and in a particular embodiment, to an electronic circuit for frequency tripling. Background technique [0004] As is known, communication at the millimeter wave (mm-wave) range has attracted much attention in recent years due to the wide available bandwidth resulting in high data transmission capacity. Therefore, current systems use transceivers that convert the exchanged signals from the base frequency to the selected communication frequency and vice versa. To this end, transceivers use circuitry to generate a local oscillation (LO). The design of local oscillator transceivers is critical because many conflicting parameters affect performance, such as tuning range, phase noise, ou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B19/14
CPCH03B19/14H03K5/00006H03K17/60
Inventor M·M·皮尔巴扎里A·马赞蒂A·帕洛塔
Owner STMICROELECTRONICS SRL