US 11,855,665 B2
Passive mixer including LLC filter and RF transmitting circuit including passive mixer
Wonjun Jung, Seoul (KR)
Assigned to SAMSUNG ELECTRONICS CO., LTD., Gyeonggi-Do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR)
Filed on May 20, 2022, as Appl. No. 17/749,399.
Claims priority of application No. 10-2021-0065648 (KR), filed on May 21, 2021.
Prior Publication US 2022/0376715 A1, Nov. 24, 2022
Int. Cl. H04B 1/04 (2006.01); H04B 1/00 (2006.01)
CPC H04B 1/04 (2013.01) [H04B 1/0057 (2013.01); H04B 2001/0425 (2013.01); H04B 2001/0491 (2013.01)] 20 Claims
OG exemplary drawing
 
17. An electronic device comprising:
a controller; and
a communication interface comprising,
a converter configured to convert a baseband signal into an analog signal,
a first mixer configured to convert the analog signal into an intermediate frequency (IF) signal based on a first oscillation frequency,
a second mixer configured to convert the IF signal into a radio frequency (RF) signal based on a second oscillation frequency to obtain an output signal,
an RF filter configured to filter the output signal to obtain a filtered output signal, and
a driving amplifier configured to amplify the filtered output signal, wherein the RF filter comprises,
a first inductor connecting a first node of a differential output end of the second mixer to a first intermediate node,
a second inductor connecting a second node of the differential output end of the second mixer to a second intermediate node,
a third inductor connecting the first intermediate node to the second intermediate node, and
a capacitor in parallel with the third inductor; and
processing circuitry configured to adjust a capacitance value of the capacitor based on a capacitance value of the driving amplifier.