Patent ID: 7289007
Filing Date: 2007-10-30
Classification: H03H

Abstract:
1. A temperature compensated variable tilt equalizer configured to operate over a defined frequency range, comprising: (a) a radio frequency (RF) input for receiving an RF signal having a wide passband; (b) an automatic temperature compensation circuit having an adjustable compensation range used to correct temperature-related tilt variances that occur on the passband of the RF signal over the defined frequency range; (c) a manual alignment circuit used to manually adjust tilt of the passband of the RF signal over the defined frequency range, wherein the variable tilt equalizer does not require a power source other than the RF signal; and (d) a limiting circuit for limiting the range of the variable resistor in the manual alignment circuit to prevent extreme settings, wherein the manual alignment circuit includes a variable capacitor coupled to a variable resistor and the limiting circuit includes a first resistor connected in parallel with the variable resistor of the manual alignment circuit, and a second resistor coupled in series with the first resistor and the variable resistor.