US 12,494,741 B2
Voltage controlled oscillator, system circuit, and control method thereof
Ling Li, Shanghai (CN); and Lu Chai, Shanghai (CN)
Assigned to BESTECHNIC (SHANGHAI) CO., LTD., Shanghai (CN)
Filed by Bestechnic (Shanghai) Co., Ltd., Shanghai (CN)
Filed on Dec. 13, 2023, as Appl. No. 18/537,942.
Application 18/537,942 is a continuation of application No. PCT/CN2023/105851, filed on Jul. 5, 2023.
Claims priority of application No. 202310553864.5 (CN), filed on May 16, 2023.
Prior Publication US 2024/0388250 A1, Nov. 21, 2024
Int. Cl. H03B 5/12 (2006.01)
CPC H03B 5/1212 (2013.01) [H03B 5/12 (2013.01); H03B 5/1228 (2013.01); H03B 5/1243 (2013.01); H03B 2200/0072 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A voltage controlled oscillator (VCO), comprising:
a first oscillator circuit comprising:
a first active oscillation core electrically coupled to a first output end and a second output end of the first oscillator circuit; and
a first inductor, wherein a first end and a second end of the first inductor are electrically coupled to the first output end and the second output end of the first oscillator circuit, respectively; and
a second oscillator circuit comprising:
a second active oscillation core electrically coupled to a first output end and a second output end of the second oscillator circuit; and
a second inductor, wherein a first end and a second end of the second inductor are electrically coupled to the first output end and the second output end of the second oscillator circuit, respectively,
wherein the first inductor is separate from the second inductor and embedded inside the second inductor,
wherein a total mutual inductance between the first and second inductors is smaller than or equal to a predetermined coupled inductance threshold, and
wherein the second inductor is wound in an annular shape, and the first inductor is wound in a figure-of-eight shape nested inside the annular shape of the second inductor.