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Class Information
Number: 333/214
Name: Wave transmission lines and networks > Negative resistance or reactance networks of the active type > Simulating specific type of reactance
Description: Subject matter wherein a positive-valued inductance or capacitance is produced.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7573332 |
Amplifier with active inductor |
Aug. 11, 2009 |
| 7548136 |
Distortion reduction for variable capacitance devices |
Jun. 16, 2009 |
| 7522023 |
Gyrator with feedback resistors |
Apr. 21, 2009 |
| 7511573 |
Input/output signals preserver circuit of amplification circuits |
Mar. 31, 2009 |
| 7512389 |
Active inductors using bipolar silicon transistors |
Mar. 31, 2009 |
| 7253707 |
Tunable active inductor |
Aug. 7, 2007 |
| 7215227 |
Gm-C filter compensation |
May. 8, 2007 |
| 7199685 |
Three-terminal, tunable active inductor |
Apr. 3, 2007 |
| 7151407 |
Switched-mode power amplifier using lumped element impedance inverter for parallel combining |
Dec. 19, 2006 |
| 7068130 |
Active inductor |
Jun. 27, 2006 |
| 7049888 |
Active inductance circuit and differential amplifier circuit |
May. 23, 2006 |
| 7049907 |
System and method for adjusting group delay |
May. 23, 2006 |
| 7042317 |
High-frequency active inductor |
May. 9, 2006 |
| 7012487 |
Transconductance device employing native MOS transistors |
Mar. 14, 2006 |
| 6958668 |
Active inductor |
Oct. 25, 2005 |
| 6856215 |
System and method for adjusting group delay |
Feb. 15, 2005 |
| 6838957 |
Differential metal oxide semiconductor capacitor |
Jan. 4, 2005 |
| 6836199 |
Tuning circuit |
Dec. 28, 2004 |
| 6809616 |
Inductor equivalent circuit and application thereof |
Oct. 26, 2004 |
| 6737944 |
Active inductor |
May. 18, 2004 |
| 6734767 |
Diplexer |
May. 11, 2004 |
| 6707354 |
Active circuit for synthesizing an inductor |
Mar. 16, 2004 |
| 6628181 |
Tuning circuit having a resonance circuit and a negative resistance circuit |
Sep. 30, 2003 |
| 6552634 |
Wideband, minimum-rating filters and multicouplers for power amplifiers |
Apr. 22, 2003 |
| 6515560 |
Active inductor |
Feb. 4, 2003 |
| 6437649 |
Microwave amplifier |
Aug. 20, 2002 |
| 6340916 |
Ransimpedance amplifier circuit |
Jan. 22, 2002 |
| 6300824 |
Analog offset cancellation method and circuit and amplifier using such circuit |
Oct. 9, 2001 |
| 6292064 |
Voltage controlled oscillator and semiconductor IC device including a voltage controlled capacitor |
Sep. 18, 2001 |
| 6211753 |
Active tunable inductor |
Apr. 3, 2001 |
| 6114930 |
Impedance controlled by the phase angle between two signals |
Sep. 5, 2000 |
| 6060961 |
Co-polarized diplexer |
May. 9, 2000 |
| 6037843 |
Controllable reactance circuit for an integrated circuit |
Mar. 14, 2000 |
| 6028496 |
Active inductor |
Feb. 22, 2000 |
| 5949295 |
Integratable tunable resonant circuit for use in filters and oscillators |
Sep. 7, 1999 |
| 5821825 |
Optically controlled oscillator |
Oct. 13, 1998 |
| 5815044 |
Variable-reactance circuit |
Sep. 29, 1998 |
| 5786726 |
Device of the phase-locked loop type for demodulating a frequency-modulated signal |
Jul. 28, 1998 |
| 5726613 |
Active inductor |
Mar. 10, 1998 |
| 5600288 |
Synthetic inductor in integrated circuits for small signal processing |
Feb. 4, 1997 |
| 5510755 |
Temperature stable voltage-controlled electronic capacitance for an oscillator |
Apr. 23, 1996 |
| 5499392 |
Filter having a variable response time for filtering an input signal |
Mar. 12, 1996 |
| 5485115 |
Impedance synthesizer |
Jan. 16, 1996 |
| 5473276 |
MOS type power semiconductor switching device capable of protecting load shortcircuit problem under low heat dissipation |
Dec. 5, 1995 |
| 5378947 |
Filter circuit composed of glass delay line with no coil |
Jan. 3, 1995 |
| 5347238 |
Bipolar microwave monolithic voltage controlled oscillator using active inductors |
Sep. 13, 1994 |
| 5343177 |
Simulated coupled inductors using generalized impedance converters |
Aug. 30, 1994 |
| 5323277 |
Sound recording apparatus |
Jun. 21, 1994 |
| 5250917 |
Equivalent inductance circuit |
Oct. 5, 1993 |
| 5229665 |
Optically controlled active impedance element and filters employing the same |
Jul. 20, 1993 |
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