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Class Information
Number: 327/350
Name: Miscellaneous active electrical nonlinear devices, circuits, and systems > Specific input to output function > Logarithmic
Description: Subject matter wherein the output signal is proportional to an inverse exponential function of the input signal.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7616044 |
Logarithmic temperature compensation for detectors |
Nov. 10, 2009 |
| 7557636 |
Geometric ladder circuit with linear-in-dB transfer function |
Jul. 7, 2009 |
| 7453309 |
Logarithmic temperature compensation for detectors |
Nov. 18, 2008 |
| 7375576 |
Log circuit and highly linear differential-amplifier circuit |
May. 20, 2008 |
| 7340227 |
Wireless communication system and semiconductor integrated circuit |
Mar. 4, 2008 |
| 7330064 |
Geometric ladder circuit with linear-in-dB transfer function |
Feb. 12, 2008 |
| 7268609 |
Logarithmic detector or logarithmic amplifier having chopper stabilized logarithmic intercept |
Sep. 11, 2007 |
| 7196569 |
Feedback compensation for logarithmic amplifiers |
Mar. 27, 2007 |
| 7180359 |
Logarithmic temperature compensation for detectors |
Feb. 20, 2007 |
| 7010283 |
Signal waveform detection circuit |
Mar. 7, 2006 |
| 7002395 |
Demodulating logarithmic amplifier |
Feb. 21, 2006 |
| 6980044 |
Power element protection circuit and semiconductor device incorporating it |
Dec. 27, 2005 |
| 6911859 |
Method and apparatus for conversionless direct detection |
Jun. 28, 2005 |
| 6897700 |
Amplifier with digital DC offset cancellation feature |
May. 24, 2005 |
| 6842062 |
Integrated electronic circuit including non-linear inductor devices |
Jan. 11, 2005 |
| 6777998 |
Integrated electronic circuit including non-linear devices |
Aug. 17, 2004 |
| 6759892 |
Temperature compensation trim method |
Jul. 6, 2004 |
| 6753725 |
Low pass filter |
Jun. 22, 2004 |
| 6734712 |
Logarithmic amplifier |
May. 11, 2004 |
| 6720817 |
All NPN class-AB log-domain integrator with supporting input and output circuitry for low-voltage and high-frequency continuous-time filtering |
Apr. 13, 2004 |
| 6680468 |
Electrical-supply-free MOS integrated circuit |
Jan. 20, 2004 |
| 6636099 |
Logarithmic amplifier with temperature compensated detection scheme |
Oct. 21, 2003 |
| 6633247 |
Logarithmic a/d converter, method of logarithmic a/d conversion logarithmic d/a converter, method of logarithmic d/a conversion, and system for measuring physical quantity |
Oct. 14, 2003 |
| 6590437 |
Logarithmic amplifier |
Jul. 8, 2003 |
| 6559705 |
Circuit arrangement |
May. 6, 2003 |
| 6552591 |
Method and apparatus for processing a wide dynamic range signal |
Apr. 22, 2003 |
| 6507233 |
Method and circuit for compensating VT induced drift in monolithic logarithmic amplifier |
Jan. 14, 2003 |
| 6401046 |
Modulated interface for remote signals |
Jun. 4, 2002 |
| 6397161 |
Method for stabilizing output of rain sensor and protection method therefor |
May. 28, 2002 |
| 6313689 |
Power switching circuit with reduced interference radiation |
Nov. 6, 2001 |
| 6265928 |
Precision-controlled logarithmic amplifier |
Jul. 24, 2001 |
| 6249170 |
Logarithmic gain control circuit and method |
Jun. 19, 2001 |
| 6229375 |
Programmable low noise CMOS differentially voltage controlled logarithmic attenuator and method |
May. 8, 2001 |
| 6229374 |
Variable gain amplifiers and methods having a logarithmic gain control function |
May. 8, 2001 |
| 6215292 |
Method and device for generating an output current |
Apr. 10, 2001 |
| 6163198 |
Log-linear variable gain amplifiers and amplifier control apparatus and methods |
Dec. 19, 2000 |
| 6144244 |
Logarithmic amplifier with self-compensating gain for frequency range extension |
Nov. 7, 2000 |
| 6104243 |
Integrated temperature-compensated amplifier circuit |
Aug. 15, 2000 |
| 6066976 |
Apparatus and method for improved dynamic range |
May. 23, 2000 |
| 6031408 |
Square-law clamping circuit |
Feb. 29, 2000 |
| 5977812 |
Circuit and method for providing a generally log logarithmic transfer function |
Nov. 2, 1999 |
| 5909129 |
Low cost microstrip phase detector |
Jun. 1, 1999 |
| 5880618 |
CMOS differential voltage controlled logarithmic attenuator and method |
Mar. 9, 1999 |
| 5877645 |
Offset compensation circuit for integrated logarithmic amplifiers |
Mar. 2, 1999 |
| 5818279 |
Circuit arrangement comprising a logarithmic transfer function |
Oct. 6, 1998 |
| 5812008 |
Logarithmic converter |
Sep. 22, 1998 |
| 5805011 |
Self-calibration system for logarithmic amplifiers |
Sep. 8, 1998 |
| 5793244 |
Logarithmic conversion circuit |
Aug. 11, 1998 |
| 5754013 |
Apparatus for providing a nonlinear output in response to a linear input by using linear approximation and for use in a lighting control system |
May. 19, 1998 |
| 5748027 |
Low power, high linearity log-linear control method and apparatus |
May. 5, 1998 |
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