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
Indicating transfer in an IMS network
System and method for broadcasting rich media to devices over multiple carriers
Electro-optical device, method of manufacturing the same, and electronic apparatus
Area reduction for surface mount package chips
Over the counter medicinal container with surface ornamentation
Input system including position-detecting device
Editing device and editing method
  Randomly Featured Patents
Face for a timepiece
Primer or solvent resistant protective coating
Eyelet assembly
Apparatus and method for direct surface cleaning
Matrix switch of optical waveguide type and method for manufacturing the same
Iron core winding assembly
Flexible container with supporting side beams
Apparatus for utilizing spare E1 channels
Metering valve comprising a fixed inner conduit and a mobile outer sleeve
Dual-end blinds trimming machine