Bias circuit
US-10248149-B2 · Apr 2, 2019 · US
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Amplifiers with both discharge tubes and semiconductor devices as amplifying elements
Amplifiers with both discharge tubes and semiconductor devices as amplifying elements · Cooperative Patent Classification (CPC)
Electric circuits, power, telecommunications, and semiconductors.
Related technology areas
Mapped technology topics for this CPC code.
| Metric | Value |
|---|---|
| CPC code | H03F5/00 |
| Official title | Amplifiers with both discharge tubes and semiconductor devices as amplifying elements |
| Display label | Amplifiers with both discharge tubes and semiconductor devices as amplifying elements |
| Total patents | 15 |
Filing trend
Year-over-year patent counts classified under this CPC code.
Filing activity over the last five years is declining.
| Year | Patents |
|---|---|
| 2015 | 2 |
| 2016 | 4 |
| 2017 | 5 |
| 2018 | 3 |
| 2019 | 1 |
Representative patents
Representative publications under this CPC code from precomputed stats, or recent filings when stats are unavailable.
Bias circuit
US-2018275709-A1 · Sep 27, 2018 · US
Architecture of a wideband distributed amplification device
US-10027296-B2 · Jul 17, 2018 · US
Impedance converter and condenser microphone
US-9893691-B2 · Feb 13, 2018 · US
Impedance converter and condenser microphone
US-2017187342-A1 · Jun 29, 2017 · US
Power amplifier and input signal adjusting method
US-9680432-B2 · Jun 13, 2017 · US
Rectifier circuit for monitoring dc offset of a single-supply audio power amplifier
US-9648420-B2 · May 9, 2017 · US
Architecture of a wideband distributed amplification device
US-2017104463-A1 · Apr 13, 2017 · US
Impedance converter circuit for condenser microphone
US-9590570-B2 · Mar 7, 2017 · US
Rectifier circuit for monitoring dc offset of a single-supply audio power amplifier
US-2016269826-A1 · Sep 15, 2016 · US
Power amplifier and input signal adjusting method
US-2016268986-A1 · Sep 15, 2016 · US
Electronic device and control method thereof
US-9413304-B2 · Aug 9, 2016 · US
Impedance converter circuit for condenser microphone
US-2016156321-A1 · Jun 2, 2016 · US
Method and apparatus for outputting audio signal
US-9136798-B2 · Sep 15, 2015 · US
Method of outputting audio signal and audio signal output apparatus using the method
US-9124226-B2 · Sep 1, 2015 · US