In response to the binary outputs of a register containing a binary number capacitive means are selectively connected to the output of a charging source to produce a ramp signal output having a slope proportional to the magnitude of the binary number. A coincidence circuit activates a discharge circuit connected to the capacitive means to terminate the ramp signal output in response to equality between the binary outputs of the register and the binary outputs of a counter accumulating the output...

A digitally controlled tuner circuit for continuous-time filters. Active RC integrators include digitally programmable feedback capacitors to allow for digital fine tuning of their time constant. The PLL-based tuner circuit includes a sine-wave oscillator made up of the digitally-controlled active RC integrators.

A digital rotary recording medium includes at least an audio component, an audio video component, and an application. The application component contains at least a browser or application program function. The information is deposited on the rotary digital recording media so that there are disparate audio and audio/video components and applications thereon. The rotary recording medium allows the user to access each element, by selection via an icon-based screen viewed function where one can inter...

A digitally controlled programmable attenuator maintains tight phase matching between attenuated signals over wide ranges of frequencies and power levels regardless of the selected attenuation level. This is achieved with a multi-tap ladder network that sets a desired tap-to-tap dB step-size, a plurality of unity gain digitally switched voltage-to-voltage buffers that are connected between the respective taps and a common output, and a fixed gain stage that sets the attenuator's overall gain/att...

A variable frequency oscillator circuit includes a ring oscillator circuit, a plurality of adjustment means for adjusting an output frequency of the ring oscillator circuit, at least one of the adjustment means having monotonic behavior, adapted to switch between first adjustment levels at a first rate and at least one of the adjustment means having non-monotonic behavior, adapted to switch between second adjustment levels at a second rate which is less than the first rate, such that the means h...

A digitally filtered laser receiver includes a plurality of radiation sensors spacially arranged in a manner which identifies a relative position of the sensors with respect to a rotating laser radiation source. The digitally filtered laser receiver includes a microcomputer having inputs which are responsive to impingement of the sensors by radiation. The microcomputer is programmed to process data from the inputs only when the radiation sensors are impinged by radiation from the rotating laser ...

The present invention regulates a power signal provided by a power source and includes two operational modes: a first mode capable of consuming low amounts of static power; and a second mode capable of smoothing voltage spikes appearing at high frequencies. The present invention further includes a generator, amplifier, and a regulator for controlling the power signal; a device for determining whether the present invention should be in the first or second operational mode; and a device for shifti...

Effective control of impedance values in integrated circuit applications is achieved with an integrated circuit transistor whose size is digitally controlled. The digitally controlled size is achieved, for example, with a parallel interconnection of MOS transistors. In one application, the digitally controlled transistor serves as a controlled impedance connected to an output terminal of an integrated circuit. In that application, a number of transistors are enabled with control signals, and the...

A digitally controlled trim circuit which includes a plurality of resistors connected in series between a circuit node and a reference voltage, a plurality of first solid-state switches (e.g., PMOS transistors) connected in series across respective ones of the resistors, a plurality of multiplexers each having an output coupled to the gate electrode of a respective one of the first switches, a plurality of first control lines coupled to a first input of respective ones of the multiplexers, a plu...

Effective control of impedance values in integrated circuit applications is achieved with an integrated circuit transistor whose size is digitally controlled. The digitally controlled size is achieved, for example, with a parallel interconnection of MOS transistors. In one application, the digitally controlled transistor serves as a controlled impedance connected to an output terminal of an integrated circuit. In that application, a number of transistors are enabled with control signals, and the...