The techniques described herein relate to duty cycle error calibration. An example apparatus includes a multi-modulus divider (MMD) circuit configured to receive a first digital code corresponding to a first time delay and included in a first plurality of digital codes associated with a first range of time delays, divide a clock signal by a divisor to generate a divided clock signal, and delay the divided clock signal by the first time delay to generate a delayed clock signal. The apparatus may further include a digitally controlled delay line (DCDL) circuit configured to receive a second digital code corresponding to a second time delay and included in a second plurality of digital codes associated with a second range of time delays, and delay the delayed clock signal by the second time delay to generate a feedback clock signal to reduce a difference between the feedback and a reference clock signal.

A real-time drug injection time duration measurement system includes a sound transducer, a waveform shaping circuit operably coupled therewith, a pulse clamping circuit operably coupled with the waveform shaping circuit, and a timer operably coupled with the pulse clamping circuit. The sound transducer detects a first sound associated with drug delivery initiation and a second sound associated with drug delivery completion and is further converts the detected first and second sounds into a first electronic waveform and a second electronic waveform, respectively. The waveform shaping circuit converts the first and second waveforms into a first pulse and a second pulse, respectively. The pulse clamping circuit triggers upon receiving the first pulse and generate a regenerated pulse. The timer initiates upon receiving the regenerated pulse and stop upon receiving a subsequent regenerated pulse via the pulse clamping circuit.

An interactive control unit is disclosed. The interactive control unit includes an interactive touchscreen display, an interface configured to couple the control unit to a surgical hub, a processor, and a memory coupled to the processor. The memory stores instructions executable by the processor to receive input commands from the interactive touchscreen display located inside a sterile field and transmit the input commands to the surgical hub to control devices coupled to the surgical hub located outside the sterile field.

A surgical instrument is disclosed. The surgical instrument includes an electric motor and a control circuit. The control circuit includes a plurality of logic gates and a monostable multivibrator. The monostable multivibrator is connected to a first one of the logic gates. The control circuit is configured to alter a rate of action of a function of the surgical instrument by controlling a speed of rotation of the electric motor based on a sensed parameter.

A surgical instrument is disclosed. The surgical instrument includes a body, a shaft and a control circuit. The control circuit includes at least one sensing device and is to determine a presence of another surgical instrument proximate to the surgical instrument within an environment of a surgical procedure.

A surgical instrument is disclosed comprising a housing and a control circuit mounted to and/or embedded in the housing.

A surgical instrument is disclosed comprising an actuator and circuitry mounted on and/or embedded in the actuator.

A surgical instrument is disclosed comprising a control system and a strain gage circuit. The operation of the control system is modifiable by an input from the strain gage circuit.

A surgical hub is disclosed. The surgical hub includes a processor and a memory coupled to the processor. The memory stores instructions executable by the processor to receive image data from an image sensor, generate a first image based on the image data, display the first image on a surgical hub display coupled to the processor, receive a signal from a non-contact sensor, the signal indicative of a position of a surgical device, generate a second image based on the signal indicative of the position of the surgical device, and display the second image on the surgical hub display coupled to the processor.

A surgical instrument is disclosed. The surgical instrument includes a shaft, a sensing array and a fluid detection circuit. The sensing array is positioned within the shaft. The fluid detection circuit is electrically coupled to the sensing array, and is configured to determine when a fluid originating from an environment external to the shaft is present within the shaft.