US 12,287,657 B2
Signal conversion circuit
Chih-Liang Yen, Taipei (TW); Jianmin Kong, Suzhou (CN); and Peng Xu, Suzhou (CN)
Assigned to Sercomm Corporation, Taipei (TW)
Filed by Sercomm Corporation, Taipei (TW)
Filed on Sep. 7, 2023, as Appl. No. 18/463,246.
Claims priority of application No. 202211349519.1 (CN), filed on Oct. 31, 2022.
Prior Publication US 2024/0143004 A1, May 2, 2024
Int. Cl. H04B 3/54 (2006.01); G05F 1/56 (2006.01)
CPC G05F 1/56 (2013.01) [H04B 3/542 (2013.01); H04B 3/548 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A signal conversion circuit, comprising:
a voltage adjustment circuit, comprising a control terminal, an input terminal coupled to a power voltage, and an output terminal coupled to an output terminal of the signal conversion circuit; and
a control circuit, coupled to the voltage adjustment circuit for providing a control signal to the control terminal of the voltage adjustment circuit, controlling the control signal to change between a first control voltage level and a second control voltage level according to a signal level of an input data signal, or deciding whether to provide a default voltage to the output terminal of the voltage adjustment circuit according to the input data signal,
wherein the control terminal of the voltage adjustment circuit is coupled to the power voltage to receive the control signal, and the control circuit comprises:
a first switch circuit, having a control terminal receiving the input data signal; and
a second switch circuit, coupled between the power voltage and the output terminal of the voltage adjustment circuit,
wherein the first switch circuit is coupled between a control terminal of the second switch circuit and a reference voltage, and the first switch circuit determines whether to connect the control terminal of the second switch circuit to the reference voltage according to the input data signal, and accordingly to turn on the second switch circuit.