公开(公告)号：US20190190535A1

公开(公告)日：2019-06-20

申请号：US16219812

申请日：2018-12-13

Applicant: INVENSENSE, INC.

Inventor： Vadim Tsinker

IPC: H03M3/00 ,  H03M1/12 ,  H03M1/34 ,  H03M1/50

CPC classification number: H03M3/496 ,  H03M1/124 ,  H03M1/34 ,  H03M1/50 ,  H03M2201/2344

Abstract: Facilitating a reduction in sensor system latency, circuit size, and current draw utilizing a group of continuous-time Nyquist rate analog-to-digital converters (ADCs) in a round-robin manner is presented herein. A sensor system can comprise a group of sensors that generate respective sensor output signals based on an external excitation of the sensor system; a multiplexer that facilitates a selection, based on a sensor selection input, of a sensor output signal of the respective sensor output signals corresponding to a sensor of the group of sensors; a sense amplifier comprising a charge or voltage sensing circuit that converts the sensor output signal to an analog output signal; and a continuous-time Nyquist rate analog-to-digital converter of the group of continuous-time Nyquist rate ADCs that converts the analog output signal to a digital output signal representing at least a portion of the external excitation of the sensor system.

公开(公告)号：US4010422A

公开(公告)日：1977-03-01

申请号：US409425

申请日：1973-10-25

Applicant: Kornelis Jan Wouda

Inventor： Kornelis Jan Wouda

IPC: H03M1/00 ,  H04B14/04 ,  H04B1/04

CPC classification number: H04B14/04 ,  H03M1/00 ,  H04B14/048 ,  H03M2201/01 ,  H03M2201/14 ,  H03M2201/16 ,  H03M2201/196 ,  H03M2201/2344 ,  H03M2201/4105 ,  H03M2201/4135 ,  H03M2201/4204 ,  H03M2201/4212 ,  H03M2201/4225 ,  H03M2201/4233 ,  H03M2201/425 ,  H03M2201/4262 ,  H03M2201/52 ,  H03M2201/523 ,  H03M2201/534 ,  H03M2201/60 ,  H03M2201/6121 ,  H03M2201/712 ,  H03M2201/715 ,  H03M2201/8124

Abstract: A non-linear pulse code modulator wherein input signals are coded into digital representations of amplitude range segments and amplitude in excess of the minimum amplitude within the respective range segment uses a first analog-to-digital converter having a sawtooth-shaped control characteristic to determine the amplitude range segment from an input signal sample. The output of the first analog-to-digital converter is used to effectively divide the signal sample by a factor 2.sup.n, where n corresponds to the determined range. The result of the division is then converted in a second analog-to-digital conversion to a digital signal that is combined with the digital range segment signal for transmission thereof.