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Class Information
Number: 330/133
Name: Amplifiers > With control of power supply or bias voltage > With control of input electrode or gain control electrode bias > Different bias control means for different stages of cascade amplifier
Description: Subject matter including at least two stages of amplification (each stage as defined in the class definition with at least two such stages as defined in subclass 129) such that the input signal of each stage except the first is the output signal of the preceding stage and wherein the bias control for each of at least two of the stages as defined in subclass 129 has some characteristic or characteristics distinctive from the other.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7450915 |
Smart transmitter system |
Nov. 11, 2008 |
| 7439806 |
Bias control circuit and method of controlling bias of RF power amplifier |
Oct. 21, 2008 |
| 7439809 |
Radio frequency power amplifier |
Oct. 21, 2008 |
| 7394318 |
Amplifier control system |
Jul. 1, 2008 |
| 7395036 |
Semiconductor integrated circuit for high frequency power amplifier and electric components with the semiconductor integrated circuit |
Jul. 1, 2008 |
| 7382296 |
System for mixed analog-digital automatic gain control |
Jun. 3, 2008 |
| 7378909 |
Radio-frequency power amplifier apparatus and method of adjusting output power thereof |
May. 27, 2008 |
| 7375584 |
Gain adjustment method, gain adjustment circuit, and optical disc device having same gain adjustment circuit |
May. 20, 2008 |
| 7368988 |
High-frequency power amplifier |
May. 6, 2008 |
| 7345537 |
Linear power amplifier with multiple output power levels |
Mar. 18, 2008 |
| 7342445 |
Radio frequency power amplifier circuit and method |
Mar. 11, 2008 |
| 7342454 |
Analog multistage amplification circuit in the field of sensor |
Mar. 11, 2008 |
| 7330072 |
Circuit for power amplification |
Feb. 12, 2008 |
| 7319363 |
Method and circuit for controlling amplification |
Jan. 15, 2008 |
| 7313372 |
Stable process induced correction bias circuitry for receivers on single-ended applications |
Dec. 25, 2007 |
| 7298207 |
Automatic gain control for a multi-stage gain system |
Nov. 20, 2007 |
| 7271662 |
High frequency power amplifier circuit and electric component for high frequency power amplifier |
Sep. 18, 2007 |
| 7271658 |
Electric component for high frequency power amplifier |
Sep. 18, 2007 |
| 7269156 |
High-frequency circuit device |
Sep. 11, 2007 |
| 7268626 |
Compensating a power amplifier based on operational-based changes |
Sep. 11, 2007 |
| 7268618 |
Power amplifiers |
Sep. 11, 2007 |
| 7262657 |
Bias control for reducing amplifier power consumption and maintaining linearity |
Aug. 28, 2007 |
| 7256654 |
Amplifying a signal using a current shared power amplifier |
Aug. 14, 2007 |
| 7257383 |
Method and system for improving dynamic range for communication systems using upstream analog information |
Aug. 14, 2007 |
| 7250817 |
Linear power efficient radio frequency (RF) driver system and method with power level control |
Jul. 31, 2007 |
| 7248111 |
Multi-mode digital bias control for enhancing power amplifier efficiency |
Jul. 24, 2007 |
| 7245180 |
Intelligent RF power control for wireless modem devices |
Jul. 17, 2007 |
| 7227415 |
High frequency power amplifier circuit and radio communication system |
Jun. 5, 2007 |
| 7215203 |
High frequency power amplifier circuit device |
May. 8, 2007 |
| 7212592 |
Digitally programmable gain control circuit |
May. 1, 2007 |
| 7205840 |
Wideband CMOS gain stage |
Apr. 17, 2007 |
| 7199657 |
Amplification gain stages having replica stages for DC bias control |
Apr. 3, 2007 |
| 7196579 |
Gain-controlled amplifier, receiver circuit and radio communication device |
Mar. 27, 2007 |
| 7193459 |
Power amplifier control technique for enhanced efficiency |
Mar. 20, 2007 |
| 7194242 |
Direct-conversion transmitter circuit and transceiver system |
Mar. 20, 2007 |
| 7190220 |
Circuit for providing a base operating voltage for a bipolar transistor and amplifier circuit |
Mar. 13, 2007 |
| 7180367 |
Systems, methods and devices for differential active bias of multi-stage amplifiers |
Feb. 20, 2007 |
| 7167045 |
System and method for modifying output power of an information communication system |
Jan. 23, 2007 |
| 7157966 |
Multi-mode power amplifier |
Jan. 2, 2007 |
| 7135921 |
Differential circuit, amplifier circuit, driver circuit and display device using those circuits |
Nov. 14, 2006 |
| 7132891 |
Power amplifier control using a switching power supply |
Nov. 7, 2006 |
| 7123094 |
High frequency power amplifier circuit and radio communication system |
Oct. 17, 2006 |
| 7123089 |
Power amplifier with pulse differentiating circuit |
Oct. 17, 2006 |
| 7119616 |
Method and apparatus for a fully differential amplifier output stage |
Oct. 10, 2006 |
| 7113034 |
High frequency power amplifier and wireless communication module |
Sep. 26, 2006 |
| 7109791 |
Tailored collector voltage to minimize variation in AM to PM distortion in a power amplifier |
Sep. 19, 2006 |
| 7098732 |
Multi-stage variable gain amplifier utilizing overlapping gain curves to compensate for log-linear errors |
Aug. 29, 2006 |
| 7078975 |
Power amplifier module |
Jul. 18, 2006 |
| 7075374 |
Method and apparatus to provide wideband low noise amplification |
Jul. 11, 2006 |
| 7072130 |
Auto-ranging attenuators for read channels |
Jul. 4, 2006 |
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