Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
97 words
A compensation amplifier for an automobile antenna utilizing, as an antenna element, a heating element for removing fog from an automobile rear window, said compensation amplifier characterized by comprising: a band-pass filter coil (La1, Lf1) interposed between a power source (B) of a vehicle and said heating element (H), the band-pass filter coil (La1, Lf1) forming a band-pass filter circuit with a floating capacitor (Cs) connected between said heating element (H) and a ground potential terminal; and compensation circuit means connected to said band-pass filter circuit and for amplifying a signal output from said band-pass filter circuit.
Claim 2
Dependent Claim
97 words
A compensation amplifier for an automobile antenna utilizing, as an antenna element, a heating element for removing fog from an automobile rear window, said compensation amplifier characterized by comprising: a band-pass filter coil (La1, Lf1) interposed between a power source (B) of a vehicle and said heating element (H), the band-pass filter coil (La1, Lf1) forming a band-pass filter circuit with a floating capacitor (Cs) connected between said heating element (H) and a ground potential terminal; and compensation circuit means connected to said band-pass filter circuit and for amplifying a signal output from said band-pass filter circuit.
Claim 3
Dependent Claim
36 words
A compensation amplifier according to claim 1, characterized by further comprising a cancelling coil (Lc) for cancelling out a direct current magnetization which is caused by a direct current flowing through said band-pass filter coil (La1).
Claim 4
Dependent Claim
31 words
A compensation amplifier according to claim 2, characterized in that said band-pass filter coil (La1) and said cancelling coil (Lc) are wound on a ferrite core (F) as a bifilar winding.
Claim 5
Dependent Claim
28 words
A compensation amplifier according to claim 2, characterized in that said band-pass filter coil (La1) and said cancelling coil (Lc) are wound on a ferrite core (F) separately.
Claim 6
Dependent Claim
24 words
A compensation amplifier according to claim 3 or 4, characterized in that said ferrite core (F) is a toroidal core with an air gap.
Claim 7
Dependent Claim
30 words
A compensation amplifier according to claim 2, characterized in that said band-pass filter coil (La1) and said cancelling coil (Lc) are connected to each other via a coupling capacitor (Co).
Claim 8
Dependent Claim
72 words
A compensation amplifier according to claim 1, characterized in that said band-pass filter circuit is a circuit for passing a frequency-modulation radio signal and characterized in that said band-pass filter circuit and said compensation circuit means form a double tuning circuit in which said band-pass filter circuit is a primary tuning circuit and said compensation circuit means is a secondary tuning circuit made up of a coil (Lf2) and a capacitor (cf).
Claim 9
Dependent Claim
85 words
A compensation amplifier according to claim 1, characterized in that said band-pass filter circuit is a circuit for passing an amplitude-modulation radio signal and characterized in that said band-pass filter circuit and said compensation circuit means form a double tuning circuit in which said band-pass filter circuit and a tuning capacitor (Cb) form a high-pass filter as a primary tuning circuit and said compensation circuit means is a low-pass filter made up of a coil (La2) and a capacitor (Ca) as a secondary tuning circuit.