High-frequency amplifier circuit
A signal is sampled at a stage following a first amplifier circuit and preceding a second amplifier circuit, and the presence or absence of a signal is detected by a detector circuit. When the presence of a signal is detected, a gate bias circuit switches a gate bias for FETs in the second amplifier...
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| creator | Shigaki, Masafumi |
| description | A signal is sampled at a stage following a first amplifier circuit and preceding a second amplifier circuit, and the presence or absence of a signal is detected by a detector circuit. When the presence of a signal is detected, a gate bias circuit switches a gate bias for FETs in the second amplifier circuit to a normal operating voltage value, and when the signal is no longer detected, the gate bias is switched to a voltage value that reduces power consumption, after a mask time has elapsed. In a distortion feedback-type high-frequency amplifier circuit, a means for cutting off a circuit portion for the adjustment of each of a distortion extracting circuit and an inverse distortion adding circuit is achieved by switching FET gate voltage so as to put the corresponding amplifier in a virtually cutoff condition. |
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When the presence of a signal is detected, a gate bias circuit switches a gate bias for FETs in the second amplifier circuit to a normal operating voltage value, and when the signal is no longer detected, the gate bias is switched to a voltage value that reduces power consumption, after a mask time has elapsed. 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When the presence of a signal is detected, a gate bias circuit switches a gate bias for FETs in the second amplifier circuit to a normal operating voltage value, and when the signal is no longer detected, the gate bias is switched to a voltage value that reduces power consumption, after a mask time has elapsed. 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When the presence of a signal is detected, a gate bias circuit switches a gate bias for FETs in the second amplifier circuit to a normal operating voltage value, and when the signal is no longer detected, the gate bias is switched to a voltage value that reduces power consumption, after a mask time has elapsed. In a distortion feedback-type high-frequency amplifier circuit, a means for cutting off a circuit portion for the adjustment of each of a distortion extracting circuit and an inverse distortion adding circuit is achieved by switching FET gate voltage so as to put the corresponding amplifier in a virtually cutoff condition.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng |
| recordid | cdi_uspatents_grants_06914483 |
| source | USPTO Issued Patents |
| title | High-frequency amplifier circuit |
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