| Patents for H03F 1 - Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements (30,272) |
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| 11/10/1998 | US5834977 Amplifying circuit with power supply switching circuit |
| 11/10/1998 | US5834976 Frequency self-compensated operational amplifier |
| 11/10/1998 | US5834952 Open-loop current mode biasing scheme for MR head |
| 11/05/1998 | WO1998049771A1 Battery life extending technique for mobile wireless applications |
| 11/05/1998 | WO1998049761A1 Thermal shutdown circuit and method for sensing thermal gradients to extrapolate hot spot temperature |
| 11/05/1998 | WO1998035438A3 Transistorized two-port variable-conductance network |
| 11/05/1998 | CA2285236A1 Battery life extending technique for mobile wireless applications |
| 11/04/1998 | EP0875096A1 Method and circuit arrangement for reducing offset voltage of a signal |
| 11/04/1998 | CN1198268A Device with amplifier means including safety means, and with filter means connected to the amplifier means |
| 11/03/1998 | US5832373 Output power control device |
| 11/03/1998 | US5831479 Power delivery system and method of controlling the power delivery system for use in a radio frequency system |
| 11/03/1998 | US5831478 Feedforward amplifier |
| 11/03/1998 | US5831475 Method and apparatus for delay matching in a power amplifier |
| 11/03/1998 | CA2136749C Power amplifier bias control circuit and method |
| 10/29/1998 | WO1998048520A1 Vswr control technique for terminal products with linear modulation |
| 10/29/1998 | WO1998048509A2 Power amplifier and method for temperature control therein |
| 10/29/1998 | CA2287264A1 Power amplifier and method therein |
| 10/28/1998 | EP0874451A2 Variable gain amplifier |
| 10/28/1998 | EP0874450A1 Power amplifiers device with small power degradation during failures |
| 10/27/1998 | US5828269 High-frequency amplifier with high input impedance and high power efficiency |
| 10/27/1998 | US5828264 Two-stage operational amplifier circuit with wide output voltage swings |
| 10/22/1998 | WO1998047222A1 An amplifier circuit having a high linearity mode of operation and a high efficiency mode of operation |
| 10/22/1998 | WO1998047220A1 Current feedback differential amplifier clamp |
| 10/22/1998 | WO1998047219A1 Temperature compensated amplifier |
| 10/21/1998 | CN1196577A Semiconductor integrated circuit |
| 10/20/1998 | US5825251 Audio signal amplifying circuit |
| 10/20/1998 | US5825250 Operational amplifier having an adjustable frequency compensation |
| 10/20/1998 | US5825248 Low power consuming balanced transformer less amplifier device |
| 10/20/1998 | US5825247 Electric power amplifier and method for its operation |
| 10/20/1998 | US5824895 Air flow meter of a heating resistor type |
| 10/15/1998 | WO1998045938A1 Audio transient suppression device |
| 10/14/1998 | EP0870361A1 Efficient parallel-stage power amplifier |
| 10/14/1998 | EP0870360A1 Differential amplifier with improved low-voltage linearity |
| 10/14/1998 | EP0541789B1 Feed forward amplifier network with frequency swept pilot tone |
| 10/14/1998 | CN1195925A Linearization of amplifier employing modified feedforward correction |
| 10/08/1998 | WO1998044627A1 Power amplication system with intelligent control of amplifier modules |
| 10/08/1998 | WO1998044626A2 Pulse referenced control method for enhanced power amplification of a pulse modulated signal |
| 10/08/1998 | WO1998044625A1 Laser optimized impedance matching networks for discrete rf transistors |
| 10/08/1998 | DE19712263A1 Two-stage operational amplifier apparatus with dynamic output impedance |
| 10/08/1998 | CA2285347A1 Power amplification system with intelligent control of amplifier modules |
| 10/07/1998 | EP0869606A2 Feed-forward amplifier |
| 10/07/1998 | CN1195226A Feed forward amplifier system and method |
| 10/07/1998 | CN1195224A Bias circuit for FET amplifier |
| 10/06/1998 | US5818301 Power amplifier arrangenment of a plural power supply switching type |
| 10/06/1998 | US5818298 Linear amplifying apparatus using coupled non-linear amplifiers |
| 10/01/1998 | DE19713571C1 Controlled resistance for semi conductor differencing amplifier |
| 09/29/1998 | US5815040 Wide bandwidth, current sharing, MOSFET audio power amplifier with multiple feedback loops |
| 09/29/1998 | US5815039 Low-voltage bipolar OTA having a linearity in transconductance over a wide input voltage range |
| 09/29/1998 | US5815038 Distortion compensation circuit |
| 09/29/1998 | US5815036 Apparatus and method for controlling feedforward amplifier |
| 09/29/1998 | US5815034 Capacitive coupling circuit with diode-biased differential amplifier |
| 09/29/1998 | US5815012 Voltage to current converter for high frequency applications |
| 09/24/1998 | WO1998042080A1 Power interface circuit for a tdma transmitter |
| 09/24/1998 | WO1998042072A1 Rail-to-rail operational amplifier |
| 09/24/1998 | DE19804747A1 Band separation reference circuit |
| 09/23/1998 | CN1193844A High frequency variable gain amplifier device and wireless communications terminal |
| 09/22/1998 | US5812028 Audio signal amplifier circuit and a portable acoustic apparatus using the same |
| 09/22/1998 | US5812023 Voltage offset compensation circuit |
| 09/22/1998 | US5812022 Differential amplifier circuit having low noise input transistors |
| 09/22/1998 | US5812008 Logarithmic converter |
| 09/22/1998 | CA2124718C Sequential amplifier |
| 09/17/1998 | WO1998028840A3 Amplifier with improved output voltage swing |
| 09/17/1998 | WO1998026502A3 Linear high-frequency amplifier with high input impedance and high power efficiency |
| 09/16/1998 | CN1193224A Method for controlling radio signal power according to variation of frequency and temp. in paging signal-emission machine |
| 09/15/1998 | US5809410 Low voltage RF amplifier and mixed with single bias block and method |
| 09/15/1998 | US5808516 Linearization of voltage-controlled amplifier using MOSFET gain control circuit |
| 09/15/1998 | US5808515 Semiconductor amplifying circuit having improved bias circuit for supplying a bias voltage to an amplifying FET |
| 09/15/1998 | US5808514 Three state output method and apparatus for high speed amplifiers |
| 09/15/1998 | US5808512 Feed forward amplifiers and methods |
| 09/15/1998 | US5808511 Active feedback pre-distortion linearization |
| 09/09/1998 | EP0863607A1 Method and apparatus for linearizing an efficient class D/E power amplifier using delta modulation |
| 09/08/1998 | US5805713 Solid state circuit for emulating push-pull tube amplifier |
| 09/08/1998 | US5805023 High frequency amplifier, receiver, and transmitter system |
| 09/08/1998 | US5805020 Silent start class D amplifier |
| 09/08/1998 | US5805011 Self-calibration system for logarithmic amplifiers |
| 09/08/1998 | US5805004 Integrated circuit arrangement for minimizing the temperature-dependant offset voltage of an amplifier |
| 09/08/1998 | CA2083490C Wave propagation signal transmission device and applications thereof for amplifying such signals |
| 09/06/1998 | CA2199348A1 Asymmetrical driver for asymmetrical loudspeakers |
| 09/03/1998 | WO1998038734A2 Amplifier arrangement |
| 09/03/1998 | WO1998038733A1 Flexible current control in power amplifiers |
| 09/02/1998 | EP0862265A2 Anti pop for power off |
| 09/02/1998 | EP0861520A1 Small signal linearization in power switching amplifiers |
| 09/02/1998 | EP0645059B1 Compensating for non-linear effects in signal processing with active devices |
| 09/02/1998 | CN1192084A 放大器系统 Amplifier System |
| 09/02/1998 | CN1192083A Anti-pop for power off |
| 09/01/1998 | US5802451 Non-linear compensation circuit for a power amplifier |
| 09/01/1998 | US5802182 Audio process distortion |
| 09/01/1998 | US5801584 Constant-current circuit using field-effect transistor |
| 09/01/1998 | US5801557 High voltage drivers which avoid -Vs failure modes |
| 08/27/1998 | WO1998037731A1 High-fidelity and high-efficiency analog amplifier combined with digital amplifier |
| 08/27/1998 | WO1998037627A1 Series powered, parallel output radio frequency generator |
| 08/26/1998 | EP0860941A2 Semiconductor integrated circuit having input protection circuit |
| 08/26/1998 | EP0860940A2 Linearization of an amplifier employing modified feedforward correction |
| 08/26/1998 | CN1191414A Tunable MOS linear transconductance amplifier |
| 08/25/1998 | US5798854 In-line predistorter for linearization of electronic and optical signals |
| 08/25/1998 | US5798674 Band Limited AM modulator using linear power amplification |
| 08/25/1998 | US5798668 Low-power transconductance driver amplifier |
| 08/25/1998 | US5798665 Bias controller for decreasing bias current supplied to amplifier without sacrifice if distortion |
| 08/25/1998 | US5797964 Selectively programmable variable-voltage direct-current voltage source |
| 08/20/1998 | CA2228073A1 Linearization of an amplifier employing modified feedforward correction |