Without shortening clock pulse duration serving as a unit time of a pulse generator, a pulse-width control is possible in which pulse duration varies in increments of a time length shorter than the unit time. A time width Ton_s of a pulse width finely dividing signal Vs from a DSP 17 varies by clock pulse duration T.sub.clk in response to variations in an output voltage Vo. A time control circuit 18 that has received the pulse width finely dividing signal Vs generates, in a control signal Vd, va...

The disclosure is directed to an internal pulse generator outputting a signal with a constant pulse width nevertheless of a frequency of an input signal, including a first PMOS transistor, a PMOS second transistor and an NMOS transistor which are connected between a power supply voltage and a ground voltage in series, a latch and an inverter which are connected between an output terminal and a first node as a drain of the NMOS transistor, and a Y-time delay circuit connected between the output t...

In a pulse oximeter for obtaining an oxygen saturation in a blood, a light emitter irradiates a living tissue with light beams having five different wavelengths. A light receiver receives respective light beams reflected from or transmitted through the living tissue, and converts the received light beams to electric signals. A first calculator calculates five attenuation changes of the living tissue based on fluctuations of the respective electric signals. A second calculator calculates at least...

A class B or class C pulsed RF transistor amplifier having a passive LC energy storage network. The capacitors of the network are charged to a safe non-operating voltage substantially higher than the operating voltage. The inductances and capacitances of the network are sized so that the capacitors discharge with decreasing frequency; and the capacitor nearest the transistor discharges rapidly to the operating voltage during the first part of each pulse. The pulsed amplifier eliminates the need ...

A pulse generator comprises a capacitor, means for periodically discharging the capacitor to generate pulses of electricity and means for recharging the capacitor between pulses. Means is included for sensing a residual reverse polarity charge on the capacitor after generation of a pulse and for using the energy stored in it to assist in recharging the capacitor for the next pulse.

A pulse shaper forms multi-level signals with staircase-shaped level transitions. The formation of these staircase-shaped level transitions takes place through charge exchange between a plurality of connected, component charge-forming charging capacitors and a summing capacitor adding the component charges.

A pulse oximeter includes a capacitive d.c. blocking element to separate the time varying red and infra-red components of a light source transmitted through or reflected form the blood from the composite light signals. The magnitudes of the signal amplitudes are then digitized and converted for use as independent variables applied to a ROM based look-up table to determine blood oxygen saturation.

A pulse generator with a pin-shaped switching plunger for actuating at least one contact is so designed that many switching positions are possible. It is characterized in that the switching plunger (3), which is guided in a housing, is slidable in the direction of and rotatable about its longitudinal axis (5), and that the switching plunger (3) is provided with at least one actuating member (4) which can enter into nonpositive engagement with at least one contact (2.1 to 2.8 and 1.1 to 1.8) both...

A pulse generator is disclosed comprising a toothed disk which is rotatable with a rotary shaft and is capable of actuating at least two contact pairs for generating pulses and for sensing the direction of rotation of the rotary shaft via a rocker engaging the teeth of the toothed disk by means of a mating portion, the rocker being deflectable in different directions depending on the direction of rotation of the rotary shaft, the mating portion being movable out of engagement with a tooth space ...

A pulse generator having a plunger for actuating several contacts. The plunger is guided in a housing and is slidable in the direction of and rotatable about its longitudinal axis against the action of a spring and is provided with at least one actuating member capable of entering into non-positive engagement with at least one contact both in at least one of its longitudinally adjusted positions and in at least one of its rotated positions. The plunger has a hole which runs parallel to the direc...