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Class Information
Number: 330/174
Name: Amplifiers > Interstage coupling > With electromechanical transducer (e.g., piezoelectric crystal)
Description: Subject matter wherein the coupling circuit between the two cascaded amplifier devices includes means to convert the electric signal to mechanical vibrations and means further to convert the mechanical vibrations back to electric signals, such means, generally, serving as either time or phase delay means or means to determine the transmission frequency of the coupling network.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7414466 |
Apparatus for reducing offset voltage drifts in a charge amplifier circuit |
Aug. 19, 2008 |
| 7049729 |
Amplifier converting charge signal |
May. 23, 2006 |
| 7042288 |
Charge amplifier for piezoelectric pressure sensor |
May. 9, 2006 |
| 6972619 |
Amplifier with a gain proportional to power source voltage |
Dec. 6, 2005 |
| 6781457 |
Drop amplifier housing with multiple tiers |
Aug. 24, 2004 |
| 6714070 |
Differential charge amplifier with built-in testing for rotation rate sensor |
Mar. 30, 2004 |
| 6624693 |
Amplification circuit for electric charge type sensor |
Sep. 23, 2003 |
| 6621341 |
Diagnostic medical ultrasound systems having a method and circuitry for front-end gain control |
Sep. 16, 2003 |
| 6459245 |
Voltage supply for a sensor unit and acceleration sensor unit with such a voltage supply |
Oct. 1, 2002 |
| 6392477 |
Amplification circuit for electric charge type sensor |
May. 21, 2002 |
| 6246287 |
Amplifier for piezoelectric acceleration sensor |
Jun. 12, 2001 |
| 6218898 |
Circuitry for measuring piezoelectric signals |
Apr. 17, 2001 |
| 6107881 |
Electronic interface circuit between a piezoelectric transducer and a circuit for processing a measuring signal provided by the transducer |
Aug. 22, 2000 |
| 6025762 |
Delay line incorporating a surface acoustic wave ladder filter and method of providing same |
Feb. 15, 2000 |
| 5446415 |
Intermediate frequency amplifier circuit |
Aug. 29, 1995 |
| 5130669 |
Apparatus for driving a mechanical resonator from a high impedance source |
Jul. 14, 1992 |
| 4492928 |
Comb filter |
Jan. 8, 1985 |
| 4381487 |
Resonator coupled differential amplifier |
Apr. 26, 1983 |
| 4268807 |
Band-pass filter and gain stage |
May. 19, 1981 |
| 4247827 |
Surface acoustic wave filter arrangement |
Jan. 27, 1981 |
| 4227156 |
Circuit for at least two frequencies |
Oct. 7, 1980 |
| 4021761 |
Filter circuit having an acoustic surface-wave filter device |
May. 3, 1977 |
| 4006437 |
Frequency filter |
Feb. 1, 1977 |
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