Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Logarithmic intermediate frequency amplifier circuit operable on low voltage










Image Number 5 for United States Patent #5475328.

In a logarithmic intermediate frequency amplifier circuit including first through M-th intermediate frequency amplifiers which are connected in cascade and first through M-th double balanced differential circuits which are connected to the first through the M-th intermediate frequency amplifiers, respectively, each of the first through the M-th double balanced differential circuits comprises primary, secondary, and tertiary differential circuits. The primary differential circuit includes a pair of transistors each of which is one of NPN and PNP types and which are connected to a first constant current source. The secondary differential circuit includes a pair of transistors each of which is another one of NPN and PNP types and which are connected to a second constant current source. The tertiary differential circuit includes a pair of transistors each of which is the other one of the NPN and the PNP types and which are connected to a third constant current source. The primary differential circuit is connected to the second and the third constant current sources and delivers a differential output to the secondary and the tertiary differential circuits so as to reduce currents of the second and the third constant current sources.








 
 
  Recently Added Patents
Decontamination apparatus and method
Image forming apparatus assembled with a fixing member and a pressing member
Electronic device with multi-orientation
Method and a channel estimating arrangement for performing channel estimation
Nonvolatile semiconductor memory device and method of manufacturing the same
Personal warming apparatus
Leg mounted portable computer
  Randomly Featured Patents
System and method for providing swap path voltage and temperature compensation
Construction machine
Intraocular lens and method of retaining in place
Conductive contact
Cam actuated butterfly valve
Switching circuit using a fast diode and provided with means for damping oscillations on opening
Solid waste treatment system
System and method for supporting multiple certificate authorities on a mobile communication device
Brief case with a portable wireless telephone
Methods and products for delivering biological molecules to cells using multicomponent nanostructures