Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
201 words
A DC power supply for a telephone terminating equipment located at the far end of a wire line, said DC power supply comprising: a DC voltage power source; a current regulated source I 1 connected in series to a positive lead of the DC voltage power source; a current regulated sink I 2 connected in a series to a negative lead of the DC voltage power source and connected in a series to the current regulated source I 1 ; an AC coupling device connected in series to said regulated current source I 1 and said current regulated sink I 2 ; a first resistor R 1 in parallel with I 1 and a second resistor R 2 is parallel with I 2 , whereby I 1- I 2= I E and I 1 and I 2 maintain a high impedence state, thereby not significantly impairing an AC communications signal transmitted by said AC coupling device; capacitor from said AC coupling device connected in series to the current regulated source I 1 , functioning to prevent I 1 , from flowing to the AC coupling device, and providing a circuit having excellent longitudinal balance performance and immunity to an induced noise.
Claim 2
Dependent Claim
201 words
A DC power supply for a telephone terminating equipment located at the far end of a wire line, said DC power supply comprising: a DC voltage power source; a current regulated source I 1 connected in series to a positive lead of the DC voltage power source; a current regulated sink I 2 connected in a series to a negative lead of the DC voltage power source and connected in a series to the current regulated source I 1 ; an AC coupling device connected in series to said regulated current source I 1 and said current regulated sink I 2 ; a first resistor R 1 in parallel with I 1 and a second resistor R 2 is parallel with I 2 , whereby I 1- I 2= I E and I 1 and I 2 maintain a high impedence state, thereby not significantly impairing an AC communications signal transmitted by said AC coupling device; capacitor from said AC coupling device connected in series to the current regulated source I 1 , functioning to prevent I 1 , from flowing to the AC coupling device, and providing a circuit having excellent longitudinal balance performance and immunity to an induced noise.
Claim 3
Dependent Claim
35 words
The DC power supply of claim 1 further comprising a resistor connected in series with said capacitor wherein said capacitor and said resistor together provide an impedance match to an impedance of said wire line.
Claim 4
Dependent Claim
46 words
The DC power supply of claim 1, wherein the resistors R 1 and R 2 are selected such that a voltage V 1 across R 1 and a voltage V 2 across R 2 each remain in a range between V max and V min .
Claim 5
Dependent Claim
55 words
The DC power supply of claim 3, wherein the resistors R 1 , R 2 are selected using the maximum voltage V max and the minimum voltage V min across the resistors and a maximum current I max and a minimum current I min through the resistors such that: R.sub.1 =R.sub.2 =(V.sub.max -V.sub.min)/(I.sub.max -I.sub.min). 5.
Claim 6
Dependent Claim
16 words
The DC power supply of claim 1, wherein said DC voltage power source comprises a battery.
Claim 7
Dependent Claim
24 words
The DC power supply of claim 5, wherein said current regulated source I 1 is directly connected to a positive terminal of said battery.
Claim 8
Dependent Claim
24 words
The DC power supply of claim 6, wherein said current regulated sink I 2 is directly connected to a negative terminal of said battery.
Claim 9
Dependent Claim
23 words
The DC power supply of claim 7, wherein said first resistor R 1 is directly connected to a positive terminal of said battery.
Claim 10
Dependent Claim
23 words
The DC power supply of claim 8, wherein said second resistor R 2 is directly connected to a negative terminal of said battery.
Claim 11
Dependent Claim
30 words
The DC power supply of claim 1, wherein said first resistor R 1 is directly connected in parallel to said current regulated source I 1 without any intervening components therebetween.
Claim 12
Dependent Claim
30 words
The DC power supply of claim 1, wherein said second resistor R 2 is directly connected in parallel to said current regulated sink I 2 without any intervening components therebetween.
Claim 13
Dependent Claim
21 words
The DC power supply of claim 1, wherein said capacitor is directly connected to said current regulated source I 1 .