Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
162 words
A phase splitter circuit for producing balanced opposite phase signals from an input AC signal, comprising: first and second transistors, the source of said first and second transistors being connected to a common first node, wherein said first and second transistor operate as a differential amplifier, the gate of said first transistor receiving an input AC signal; the drain of said first transistor producing a first output AC signal; the drain of said second transistor producing a second output AC signal that is 180° out of phase with said first output AC signal; a source resistor, said source resistor connected in series to said first node and ground; and a feedback circuit connected between the drain of said first transistor and the gate of said second transistor for coupling at least a fraction of an amplitude of said first output AC signal to said gate of said second transistor for tuning said amplitude and a phase between said first and second transistor.
Claim 2
Dependent Claim
162 words
A phase splitter circuit for producing balanced opposite phase signals from an input AC signal, comprising: first and second transistors, the source of said first and second transistors being connected to a common first node, wherein said first and second transistor operate as a differential amplifier, the gate of said first transistor receiving an input AC signal; the drain of said first transistor producing a first output AC signal; the drain of said second transistor producing a second output AC signal that is 180° out of phase with said first output AC signal; a source resistor, said source resistor connected in series to said first node and ground; and a feedback circuit connected between the drain of said first transistor and the gate of said second transistor for coupling at least a fraction of an amplitude of said first output AC signal to said gate of said second transistor for tuning said amplitude and a phase between said first and second transistor.
Claim 3
Dependent Claim
30 words
The circuit of claim 1, wherein the feedback circuit further comprises two resistances connected in series, wherein a ratio of said resistance values is selected to cancel out amplitude unbalance.
Claim 4
Dependent Claim
42 words
The circuit of claim 1, wherein said feedback circuit further comprises a capacitor and an inductor connected in series, said capacitor for blocking a DC voltage of said first output, said inductor for compensating for a phase lag due to said capacitor.
Claim 5
Dependent Claim
40 words
The circuit of claim 3, wherein said feedback circuit further comprises an active circuit for canceling an unbalance caused by process fluctuation, wherein a channel resistance of said active circuit depends on a control voltage applied to said active circuit.
Claim 6
Dependent Claim
40 words
The circuit of claim 1, wherein said feedback circuit includes at least one of each of an inductor, capacitor, and resistor, and wherein said second output AC signal has the substantially same frequency and amplitude as said first AC signal.
Claim 7
Dependent Claim
31 words
The circuit of claim 3, wherein a value of each of said capacitor and inductor are selected to cancel out the phase unbalance between the first and second output AC signals.
Claim 8
Dependent Claim
60 words
The circuit of claim 2, wherein said two resistances comprises a first end at one resistance and a second end at the other resistance, wherein said first end being connected to said capacitor and inductor of said feedback circuit, said second end being connected to ground, and the gate of said second transistor being connected in between the two resistances.
Claim 9
Dependent Claim
32 words
The circuit of claim 4, wherein said active circuit replaces said two resistances, such that said a channel resistance of said active circuit is adjustable by controlling a DC biasing voltage thereto.