发明名称 |
RF DEVICE WITH A TRANSMIT/RECEIVE SWITCH CIRCUIT |
摘要 |
A transmit/receive switch circuit has a comprises a controllable transmit section and a controllable receive section, having an output and an input coupled to an RF transmit/receive terminal respectively. The transmit section comprises a first transistor having a main current channel coupled between an RF transmit signal input and the RF transmit/receive terminal. The receive section comprises a first transistor having a main current channel coupled between the RF transmit/receive terminal and a RF receive signal output and a second transistor having a main current channel coupled between the RF receive signal output and ground. A signal that is derived from an RF input signal at the RF transmit/receive terminal is rectified. The rectified signal is used to control a control electrode of the second transistor of the receive section to make this transistor increasingly conductive with increasing RF signal amplitude. The rectified signal may also be used to control a control electrode of the first transistor of the transmit section in this way. Thus, the transmit/receive switch circuit is made to perform a limiting function. |
申请公布号 |
US2014159831(A1) |
申请公布日期 |
2014.06.12 |
申请号 |
US201214233643 |
申请日期 |
2012.07.20 |
申请人 |
van Wanum Maurice |
发明人 |
van Wanum Maurice |
分类号 |
H03K17/00 |
主分类号 |
H03K17/00 |
代理机构 |
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代理人 |
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主权项 |
1. An RF device comprising a transmit/receive switch circuit, the transmit/receive switch circuit comprising a controllable transmit section and a controllable receive section having an output and an input coupled to an RF transmit/receive terminal respectively, wherein
the transmit section comprises a first transistor having a main current channel coupled between an RF transmit signal input and the RF transmit/receive terminal; and the receive section comprises a first transistor having a main current channel coupled between the RF transmit/receive terminal and a RF receive signal output and a second transistor having a main current channel coupled between the RF receive signal output and ground; the transmit/receive switch circuit comprising a rectifier circuit with an input coupled to the RF transmit/receive terminal, or a circuit node that carries an RF signal derived from the RF transmit/receive terminal, and wherein the rectifier circuit has an output coupled to control electrodes of the first transistor of the transmit section and/or the second transistor of the receive section and configured to make the main current channel of the first transistor of the transmit section and/or the second transistor of the receive section increasingly conductive with increasing RF signal amplitude at the RF transmit/receive terminal.
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地址 |
Delft NL |