Self-starting circuit for switching regulators

Schematic is provided on a self-starting circuit for a switching regulator which uses a logic circuit to sense a change in output voltage and provides a correction signal for dc power sources. With this device, the total power consumed by the logic circuitry is held to a minimum, and the circuit receives the optimum regulated supply power

Strategic Diversity in Union Political Action: Implications for the 1992 House Elections

[Excerpt] The purpose of this paper is to explore labor\u27s strategic options in the 1992 elections. We will focus on House races because the diversity in political strategies among unions is most apparent there. However, our conclusions will have broader implications for union activity in elections at all levels of government. In evaluating the situation we will consider the impact of redistricting on labor\u27s alternatives. We should note that recent developments have made many union political operatives more optimistic. The upset victory by populist Democrat Harris Wofford in the special Senate election in Pennsylvania, the eventual compromises on civil rights legislation and extended unemployment benefits, and President Bush\u27s decline in popularity all increase the stakes as the labor movement searches for the appropriate tactical approach to the pending campaigns

Angel Investing: Changing Strategies During Volatile Times

Changing conditions in the angel market offer a unique opportunity to further knowledge and understanding about angel investing in the US during times of economic volatility. To identify trends in the angel market, this research examines changes in characteristics and investment behavior during a time of market expansion and contraction (2000 to 2001). While business angels remain the leading source of seed capital for business ventures, depressed yield rates and increased due diligence indicate that investors are retreating to more fundamental approaches

Small Firms and Superfund: Assessing the Impact

While all firms experience varying degrees of difficulty in complying with environmental regulations, small firms have their own set of special problems in dealing with environmental compliance. The lack of legal and engineering staffs, the management structure, and a high cost per unit of production to comply with environmental regulations implies a diversion of a small firm’s limited resources to formulating a cost effective response to the rapidly changing landscape of environmental regulations. The cornerstone of the shifting focus towards hazardous waste regulation, in terms of both actual and potential impacts, is the Comprehensive Environmental Response, Compensation, and Liability Act, commonly referred to as Superfund. Given the unique liability features of Superfund, the objective of this research is to assess the impact of Superfund liability on the ability of small firms to raise capital, invest in plant and equipment, and to continue their role as the principal job generating segment of the U.S. economy

Study of limitations and attributes of microprocessor testing techniques

All microprocessor units have a similar architecture from which a basic test philosophy can be adopted and used to develop an approach to test each module separately in order to verify the functionality of each module within the device using the input/output pins of the device and its instruction set; test for destructive interaction between functional modules; and verify all timing, status information, and interrupt operations of the device. Block and test flow diagrams are given for the 8080, 8008, 2901, 6800, and 1802 microprocessors. Manufacturers are listed and problems encountered in testing the modules are discussed. Test equipment and methods are described