US 12,375,082 B2
Devices and methods related to diode switch control
Lui Ray Lam, Lexington, MA (US)
Assigned to SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed by SKYWORKS SOLUTIONS, INC., Irvine, CA (US)
Filed on Jan. 25, 2023, as Appl. No. 18/101,139.
Claims priority of provisional application 63/306,143, filed on Feb. 3, 2022.
Prior Publication US 2023/0246644 A1, Aug. 3, 2023
Int. Cl. H03K 17/74 (2006.01); H04B 1/48 (2006.01)
CPC H03K 17/74 (2013.01) [H04B 1/48 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A radio-frequency switching circuit comprising:
an antenna port, a transmit port, and a receive port;
a PIN-diode based switch comprising a first PIN-diode and a second PIN-diode, the PIN-diode based switch being configured to selectively connect the antenna port to one of the receive port through the first PIN-diode and the transmit port through the second PIN-diode; and
diode bias control circuitry coupled to the first PIN diode and the second PIN diode of the PIN-diode based switch, the diode bias control circuitry including an input node coupled to the transmit port through the second PIN-diode, a rectifying circuit configured to receive a radio-frequency input voltage from the input node and generate a rectified voltage, and a smoothing circuit including a first connection and a second connection different than the first connection, the smoothing circuit being configured to receive the rectified voltage from the rectifying circuit through the first connection and generate a DC voltage and output the DC voltage to a cathode of the first PIN-diode through the second connection.