Abstract: Disclosed is a linear feedback shift register (LFSR)-based clock signal generator that includes an LFSR, which outputs multi-bit states based on a system clock signal (CLK0). Based on the multi-bit states, a single-phase pulse generator generates first and second clock signals (CLK1 and CLK2), where the pulse rate of CLK1 is slower than that of the CLK0 and greater than that of CLK2. In some embodiments, a first multi-phase pulse generator can generate N-phases of the CLK1 based on CLK1 and N-phases of the CLK0 and a second multi-phase pulse generator can generate N-phases of CLK2 based on CLK2 and N-phases of CLK0. Furthermore, additional registers can optionally use the N-phases of CLK2 to further generate N sets of M-phases of the CLK2. Also disclosed are a multi-level circuit (e.g., a time domain-interleaved analog-to-digital converter (ADC)), which incorporates the LFSR-based clock signal generator, and associated methods.

Abstract: A circuit including: input and output nodes and first and second feedback nodes; a first input amplifier having an input connected to the input node and an output connected to the first feedback node; a second input amplifier having an input connected to the input node and an output connected to the second feedback node; a capacitor connecting the first feedback node and the second feedback node; an amplifier having an input connected to the first feedback node and an output connected to the output node; a base feedback amplifier with an input connected to the output node and an output connected to the first feedback node; a tunable feedback amplifier with an input connected to the output node and an output connected to the second feedback node; and a tuning circuit for varying a transconductance of the tunable feedback circuit and operational frequency of the peaking amplifier circuit.

Abstract: A circuit including: input and output nodes and first and second feedback nodes; a first input amplifier having an input connected to the input node and an output connected to the first feedback node; a second input amplifier having an input connected to the input node and an output connected to the second feedback node; a capacitor connecting the first feedback node and the second feedback node; an amplifier having an input connected to the first feedback node and an output connected to the output node; a base feedback amplifier with an input connected to the output node and an output connected to the first feedback node; a tunable feedback amplifier with an input connected to the output node and an output connected to the second feedback node; and a tuning circuit for varying a transconductance of the tunable feedback circuit and operational frequency of the peaking amplifier circuit.

Abstract: The disclosure is directed to a tunable peaking amplifier circuit including: an input node, an output node and a feedback node; a first input amplifier having an input connected to the input node and an output connected to the feedback node; a second input amplifier having an input connected to the input node; a coupling capacitor connected between an output of the second input amplifier and the feedback node; an amplifier having an input connected to the feedback node and an output connected to the output node; and a feedback circuit having an input coupled to the output node and an output connected to the feedback node, the feedback circuit including a tuning circuit for varying a transconductance of the feedback circuit to adjust an operational frequency of the peaking amplifier circuit.

Abstract: A tunable peaking amplifier circuit including: an input node, an output node, and a feedback node; a first input amplifier having an input connected to the input node and an output connected to the feedback node; a second input amplifier having an input connected to the input node; a coupling capacitor connected between an output of the second input amplifier and the feedback node; an amplifier having an input connected to the feedback node and an output connected to the output node; a feedback circuit including: a base feedback amplifier having an input connected to the output node and an output connected to the feedback node; and a tunable feedback amplifier having an input connected to the output node and an output connected to the feedback node; and a tuning circuit for varying a transconductance of the feedback circuit to adjust an operational frequency of the peaking amplifier circuit.

Abstract: A circuit including: input and output nodes and first and second feedback nodes; a first input amplifier having an input connected to the input node and an output connected to the first feedback node; a second input amplifier having an input connected to the input node and an output connected to the second feedback node; a capacitor connecting the first feedback node and the second feedback node; an amplifier having an input connected to the first feedback node and an output connected to the output node; a base feedback amplifier with an input connected to the output node and an output connected to the first feedback node; a tunable feedback amplifier with an input connected to the output node and an output connected to the second feedback node; and a tuning circuit for varying a transconductance of the tunable feedback circuit and operational frequency of the peaking amplifier circuit.