US 12,166,485 B2
Methods and circuits for slew-rate calibration
Cosmin Iorga, Westlake Village, CA (US)
Assigned to Rambus Inc., San Jose, CA (US)
Filed by Rambus Inc., San Jose, CA (US)
Filed on Aug. 30, 2022, as Appl. No. 17/898,800.
Claims priority of provisional application 63/243,283, filed on Sep. 13, 2021.
Prior Publication US 2023/0080033 A1, Mar. 16, 2023
Int. Cl. H03L 7/00 (2006.01); G11C 7/22 (2006.01); H03K 3/0232 (2006.01); H03K 19/17784 (2020.01); H03L 7/081 (2006.01); H03L 7/099 (2006.01); H03L 7/195 (2006.01)
CPC H03K 3/0232 (2013.01) [G11C 7/22 (2013.01); H03K 19/17784 (2013.01); H03L 7/0818 (2013.01); H03L 7/0991 (2013.01); H03L 7/195 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An integrated circuit (IC) comprising:
an input node to receive an input signal having input-signal transitions;
a multiphase generator coupled to the input node to receive the input-signal, the multiphase generator to issue instances of the input signal, including a first instance of the input signal of a phase offset from a second instance of the input signal;
an oscillator to issue a clock signal of a clock frequency proportional to the phase offset;
calibration circuitry having a calibration input coupled to the oscillator to receive the clock signal and a calibration output coupled to the multiphase generator, the calibration circuitry to adjust the phase offset between the first instance of the input signal and the second instance of the input signal responsive to the clock frequency; and
a driving amplifier having amplifier input nodes coupled to the multiphase generator to receive the instances of the input signal, the driving amplifier to transmit an output signal having output-signal transitions.