摘要:
A circuit apparatus suitable for use as a basic building block of very small geometry integrated circuits (on the order of 1 micron and smaller) comprising (i) a current mirror circuit with a cascode output, comprising a first transistor and a second transistor connected in series, the first transistor coupled between a ground and the second transistor, and (ii) a single stage gain loop comprising a transresistance amplifier coupled between a control input of the second transistor and the series connection of the first and second transistors, wherein the circuit apparatus provides an output with high impedance output and with maximum swing capability.
摘要:
A low voltage constant transconductance input stage is achieved with relatively simple design methodology. The approach uses current-mode techniques and is based upon the processing of signal currents, rather than handling the bias currents of input stages. Such an approach becomes universal and independent of the input stage transistor types (FET or bipolar) and their operating regions. Further, the arrangement considerably simplifies the design procedure of low voltage operational amplifiers. MOS and bipolar Op Amp input stages are described wherein almost constant g.sub.m is achieved which is independent of the common mode input voltage ranging from rail-to-rail.
摘要:
The reduction of the power supply voltage of VLSI circuits to 3.3 volts results in a significant loss in input and output swing in traditional CMOS analog circuits. In order to achieve rail-to-rail operation, n-channel and p-channel MOSFETs are placed in parallel so that at least one type of transistors are operating in a high gain region throughout the entire input range. However, circuit characteristics change as transistors turn on and off. A constant transconductance bias means enables the rail-to-rail CMOS differential stage to possess a constant transconductance over the entire common mode voltage range. Significantly, the bias circuit does not require any matching between the transistors of opposite types.
摘要:
Encrypting information includes receiving a question/answer pair, generating a file pass phrase, encrypting the file with the file pass phrase, normalizing the answer, encrypting the file pass phrase with the normalized answer, creating a hash of the normalized answer; delivering encrypted information includes alerting the recipient of the encrypted file to be downloaded, providing the recipient with questions associated with the encrypted file, normalizing answers provided by the recipient, creating a hash of the normalized answers, comparing the hash to stored hashes associated with the encrypted file, allowing download of the encrypted file when a predetermined number of the stored hashes match the normalized hashes; and storing and triggering delivery of encrypted information to a recipient includes storing encrypted information about a recipient, determining a triggering event associated with the encrypted information, delivering to the recipient an invitation to retrieve the encrypted information upon occurrence of the triggering event.
摘要:
A voltage to current converter includes three field effect transistors (FETs), the sources of which are electrically connected to define a common source node, and a feedback network. First and second voltage inputs are connected to the gates of the first and second FETs, respectively. First and second current outputs are connected to the drains of the first and second FETs, respectively. The feedback network is connected between the drain of the third FET and the common source node. The feedback network controls and extends linearity by varying the voltage between the common source node and ground in response to changes in the voltage inputs in order to maintain a constant current through the third FET. The floating common source node quickly adjusts and thereby keeps a linear relationship between the input voltages and the output currents. Thus, the feedback network can dynamically bias the converter by permitting the common source node to float with respect to ground.
摘要:
Encrypting information includes receiving a question/answer pair, generating a file pass phrase, encrypting the file with the file pass phrase, normalizing the answer, encrypting the file pass phrase with the normalized answer, creating a hash of the normalized answer; delivering encrypted information includes alerting the recipient of the encrypted file to be downloaded, providing the recipient with questions associated with the encrypted file, normalizing answers provided by the recipient, creating a hash of the normalized answers, comparing the hash to stored hashes associated with the encrypted file, allowing download of the encrypted file when a predetermined number of the stored hashes match the normalized hashes; and storing and triggering delivery of encrypted information to a recipient includes storing encrypted information about a recipient, determining a triggering event associated with the encrypted information, delivering to the recipient an invitation to retrieve the encrypted information upon occurrence of the triggering event.
摘要:
The present invention relates to a method of treating a hydrocarbon stream such as a natural gas stream, the method at least comprising the steps of: (a) supplying a partially condensed feed stream (10) to a first gas/liquid separator (2), the feed stream (10) having a pressure >50 bar; (b) separating the feed stream (10) in the first gas/liquid separator (2) into a first vaporous stream (20) and a first liquid stream (70); (c) expanding the first vaporous stream (20), thereby obtaining an at least partially condensed first vaporous stream (30); (d) supplying the at least partially condensed first vaporous stream (30) to a second gas/liquid separator (4); (e) separating the stream (30) as supplied in step (d) in the second gas/liquid separator (4) into a second vaporous stream (60) and a second liquid stream (40); (f) increasing the pressure of the second liquid stream (40) to a pressure of at least 50 bar, thereby obtaining a pressurized second liquid stream (50); and (g) returning the pressurized second liquid stream (50) to the first gas/liquid separator (2).
摘要:
A system for spraying ceramic coatings on surfaces in contact with molten metals in which a constant amount of slurry made from water and ceramic powder is supplied to a pump and a hose for applying the slurry to the surface to be coated. Activation of an air valve delivers air to the hose at a sufficient pressure to spray the slurry on the surface to be coated. Deactivation of the air valve shuts off the pump.