摘要:
An analog recording and playback system using non-volatile flash memory. An array of flash memory cells is used to store an analog signal and retrieve the stored analog signal on a real-time basis. A plurality of column driver circuits are coupled to the columns of flash memory cells for simultaneous programming and reading. A programming algorithm is used to write the analog signal within an operating range of the flash memory cells since the operating range may shift due to process variations. The system includes trimbit circuits to provide a trimmable initial programming voltage, programming step, programming current, read current, and select gate voltage. The system further includes a Serial Peripheral Interface ("SPI") that interfaces with a host microcontroller. The host microcontroller can send a number of commands to the system through the SPI for efficient message management. These commands include the basic commands to record or playback and various addressing and message cueing options. The system utilizes row and column redundancy to increase production yield.
摘要:
A trimbit circuit for flash memory integrated circuits is described. The trimbit circuit is used to store the addresses of bad rows and/or columns in flash memory arrays. Furthermore the trimbit circuit is used to store the trimbits for trimable circuits in the integrated circuit, i.e. voltage references, precision oscillator, etc. The invention includes a row of flash memory trimcells and a trimcell differential amplifier circuit. The trimcell differential amplifier circuit can serially shift in trimbits into a latch and serially shift out trimbits without having to program the flash memory trimcells. The final settings of the trimbits can be programmed by means of a high voltage buffer. A non-overlapping clock generator and additional logic is also included to control the circuit.
摘要:
A trimbit circuit for flash memory integrated circuits is described. The trimbit circuit is used to store the addresses of bad rows and/or columns in flash memory arrays. Furthermore the trimbit circuit is used to store the trimbits for trimable circuits in the integrated circuit, i.e. voltage references, precision oscillator, etc. The invention includes a row of flash memory trimcells and a trimcell differential amplifier circuit. The trimcell differential amplifier circuit can serially shift in trimbits into a latch and serially shift out trimbits without having to program the flash memory trimcells. The final settings of the trimbits can be programmed by means of a high voltage buffer. A non-overlapping clock generator and additional logic is also included to control the circuit.
摘要:
The device (A) is for warning at physical contact of a vehicle with an object in its surrounding and protection of the vehicle at such a contact. The device has a detecting unit (1) and a warning unit (2), where the detecting unit (1) is adapted to be attached to a surface (B) and detect a contact of a vehicle with the detecting unit (1), and where the warning unit (2) is adapted to warn a driver of the vehicle of the detection. The detecting unit (1) consists of a force absorbing plate (11), and an inside the plate (11) acting contact devise (12). A first side (11a) of the plate (11) is adapted to be attached to the surface (B). The plate (11) is given an elasticity adapted to absorb part of the forces that can occur at a contact of a vehicle. The contact device (12) is adapted to close an electric circuit (13) at the contact, and the warning unit (2) is adapted to emit a visual signal and/or an acoustic signal when the electric circuit (13) is closed.
摘要:
A subscriber line interface circuit apparatus includes a linefeed circuit and a subscriber line control circuit (SLCC). In an embodiment, the linefeed circuit includes a signal conversion circuit which provides a differential mode signal and a common mode signal in response to at least a tip signal and a ring signal from the subscriber loop. The linefeed circuit includes a tip control circuit and a ring control circuit. In an embodiment, the SLCC is provided in a single integrated circuit chip and is coupled to the linefeed circuit which isolates the SLCC from the tip or ring signals. The SLCC includes a first and a second differential mode inputs for receiving the differential mode signal, and a common-mode input for receiving the common-mode signal. In an embodiment, the SLCC also provides various tip control signals and ring control signals to the tip control circuit and the ring control circuit, respectively.
摘要:
A multilevel analog recording and playback system is described. The analog recording and playback system provides a variety of analog processing functions to enhance system level integration. The analog recording and playback system is an fully configurable integrated device that includes a plurality of signal paths, a microphone automatic gain control (“AGC”) circuit, volume control and filtering circuit, speaker driver circuit, gain selectable analog input, auxiliary input and output paths, configurable summation amplifiers having mixing features, multilevel analog memory storage array, and user selectable programming duration.
摘要:
An integrated circuit for providing programmable microphone interface includes an input terminal for receiving an input signal and an output terminal for providing an output audio signal. The integrated circuit includes a bias circuit, an amplifier circuit, and two feedback circuits. The bias circuit provides a microphone bias signal to the microphone and provides a sensed microphone signal. The amplifier circuit includes a first input, a second input, and an output. The first input is configured to receive the sensed microphone signal, a first feedback signal, and a second feedback signal. The second input is configured to receive a first reference signal. The feedback circuits are in communication with the output and the first input of the amplifier circuit. In a specific embodiment, the first feedback circuit includes an RC circuit and the second feedback circuit includes an integrator.
摘要:
A CMOS analog switch circuit includes an NMOS switch transistor, a PMOS switch transistor, and a bias circuit. In an embodiment, the bias circuit includes a first and a second native bias transistors having their gate terminals coupled to a first and a second terminals of the CMOS switch circuit, respectively. The source terminals of the first and the second native bias transistors are coupled together and are also coupled to the body terminal of the PMOS switch transistor. In an configuration, the first and the second native bias transistors are characterized by substantially 0V threshold voltages, and the PMOS switch transistor is configured to exhibit a lower on-resistance in response to the greater of the voltages of the first terminal and the second terminal of the CMOS analog switch circuit.
摘要:
A multilevel analog recording and playback system is described. An analog processing circuit processes analog data. A storage circuit includes a non-volatile memory array, a switching circuit, and a communication interface. The non-volatile memory array stores analog and digital data. The switching circuit transfers the analog and digital data to and from the memory array. The communication interface allows a processor to exchange information with the device.
摘要:
An integrated circuit for providing programmable microphone interface includes an input terminal for receiving an input signal and an output terminal for providing an output audio signal. In an embodiment, the integrated circuit includes a bias circuit, an amplifier circuit and two feedback circuits. The amplifier circuit includes a first input, a second input, and an output. The first input receives either the input signal or a feedback signal, depending upon mode control signals. The second input receives either the feedback signal or the input signal depending upon the mode control signals. The first feedback circuit is in communication with the output and the first input of the amplifier and includes a first resistor and a first capacitor connected in parallel. The second feedback circuit includes an integrator circuit and provides the feedback signal. The mode control signals can be set in a programmable mode control register.